DTC P1502 Theft Deterrent Fuel Enable Signal Not Received. Heres how oil can influence carbon deposits. Important:Reprogramming the PCM may cause a communication error between the PCM and the TAC. P1519 Citroen Electronic . I sure hope so. P1158 HO2S Bank 2 Sensor 2 Rich or High Voltage Most ECM diagnostics involve the process of elimination. DTC P1567 Active Banking Control Active - Cruise Control Disabled P1831 PC Solenoid Power Circuit - Low Voltage Fretting corrosion looks like little dark smudges on electrical terminals and appears where the actual electrical contact is being made. P1351 Ignition Coil Control Circuit High Voltage The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. For a better experience, please enable JavaScript in your browser before proceeding. Disconnect the throttle actuator motor harness connector. P1350 Ignition Control System I took it to the dealer and they said they have never seen this and they will have to call up GM. Due To Unhooking The Battery To Fix The Radio. P1323 IC 24X Reference Circuit Low Frequency Test for a short between each throttle actuator motor control circuit and all other TAC module circuits with a DMM. Refer to P1528 GovernorP1529 Heated Windshield Request Problem P1530 Throttle Actuator Control (TAC) Module Internal Circuit No other codes are associated. P1647 Driver 1 Line 7P1650 Control Module Output B Circuit P1651 Fan 1 Relay Control Circuit P1652 Powertrain Induced Chassis Pitch Output Circuit I've been running it trouble-free for about a week (400+ miles), when all of a sudden, today, I had a problem. DTC P1624 Customer Snapshot Requested - Data Available But, since the data stream anomalies continued to bother me, we used a back-up lamp drawing 2.5 amps of current to load the circuits. DTC P1651 Fan 1 Relay Control Circuit The ignition switch is in the crank or run position. P1155 HO2S Lean Mean Bank 2 Sensor 1 P1156 HO2S Rich Mean Bank 2 Sensor 1 P1157 HO2S Bank 2 Sensor 2 Lean System or Low Voltage P1393 Wheel Speed Sensor 1 - G - Sensor Circuit High Voltage DTC P1565 Cruise Servo Position Sensor A message center or an indicator displays Reduced Engine Power. But I had to pull the proverbial rabbit out of the diagnostic hat, so I began by loosening the retainer bolt on G105, which, in this case, turned out to be barely snug. Clear editor. P1850 Brake Band Apply Solenoid Circuit P1851 Brake Band Apply Solenoid Performance P1795 CAN Bus - Throttle Body Position P1800 TCM Power Relay Control Circuit P1801 Performance Selector Switch Failure VoltageP1122 Throttle Position (TP) Sensor Circuit Intermittent Low Does the DMM indicate continuity to ground? DTC P1696 Remote Keyless Entry Voltage High, Help Keep Us Free-Tip / Donation To the Mechanics. DTC P1570 Traction Control Active - Cruise Control Disabled I took it to the dealer and they said they have never se. P1460 Cooling Fan Control System P1460 Misfire Detected With Low Fuel Level If the customer's concern is slow cranking or no crank because battery voltage is low, ignore DTCP1518. This should fix your problem. A history DTC clears after 40consecutive warm-up cycles, DTC P1685 Driver 5 Line 5 DTC P1543 A/C System Performance Refer to. P1370 IC 4X Reference Circuit Too Many Pulses Silikhan Publishing Group, llc & SilveradoSS.com DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance P1355 IC Output High/Pulse Detected when GND_Cyl. P1442 EVAP Vacuum Sw. High Voltage During Ign. DTC P1683 Driver 5 Line 3 P1532 A/C Evaporator Temp. Refer to The first Diagnostic Dilemma occurred when the Yukon started and ran perfectly after it was delivered to my clients shop. P1569 Cruise Servo Stroke High While not in Cruise P1535 A/C High Side Temperature Sensor Circuit Turn ON the ignition, with the engine OFF, Test for a short to voltage at both throttle actuator motor control circuits with a DMM. P1560 Transaxle Not in Drive - Cruise Control Disabled P1515 and P2135 are set only when our familiar P1518 is NOT present, which would explain why these two codes hadnt yet appeared. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication. IlluminationP1701 Trans. 5 DTC P1575 Extended Travel Brake Switch Circuit DTC P1599 Engine Stall or Near Stall Detected I have not gotten the PCM updates from the dealer yet. DTC P1305 Ignition Coil 2 Primary Feedback Circuit We also applied Stabilant-22 to enhance the electrical conductivity of the Throttle Activation Control (TAC) module and throttle body connector pins. DTC P1640 Driver-1-Input High Voltage DTC P1611 Loss of CVRTD Serial Data DTC P1559 Cruise Control Power Management Mode Sensor Low Voltage Refer to This could be a dirty connector or a frayed wire. DTC P1636 PCM Stack Overrun P1504 Vehicle Speed Output Circuit P1508 Idle Speed Low - Idle Air Control (IAC) System Not This is due to the many redundant tests run continuously on this system. DTC P1568 Cruise Servo Stroke Greater than Commanded in Cruise P1543 A/C System Performance P1544 A/C Refrigerant Condition Very Low P1219 Throttle Position Sensor Reference Voltage Okay, that is the crankcase vent for the PCV system and it can easily cause a misfire because it pulls in air that the computer does not "see" with its sensors. The car will not start now. DTC P1588 Cruise Control Clutch Control Circuit High Included among the diagnostic trouble codes was the now-familiar P1518. Low voltage can cause this DTC to set. ActiveP1580 Cruise Move Circuit Low Voltage P1581 Cruise Move Circuit High Voltage P1582 Cruise Direction Circuit Low Voltage When my truck is wot some times it will shut down and says reduced engin power.I scand it and three fault codes came up .1. p1516 electronic throttle module tp 2. p1518 electronic throttle module to pcm communication 3. p2108 unknown fault. P1240 Injector Circuit Cylinder 7 Intermittent Before it was not that noticeable. Now, if the 8.1L has this problem it stats its because of an electronic throttle control system fault, which even sounds similar to your situation. DTC P1555 Electronic Variable Orifice Output P1234 Injector Circuit Cylinder 5 Intermittent P1143 HO2S Bank 1 Sensor 3 Lean System or Low Voltage Repairing Connector Terminals DTC P1527 Transmission Range to Pressure Switch Correlation DTC P1629 Theft Deterrent System - Cranking Signal Remove the cover from the underhood electrical center. P1558 Cruise Control Servo Indicates Low (adsbygoogle = window.adsbygoogle || []).push({}); The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC), Engine Light ON (or Service Engine Soon Warning Light), P1514 Citroen Idle air control solenoid valve signal 3 circuit low input, P1519 Citroen Electronic Throttle Module Low Volts Communication Disable, P2797 Suzuki Auxiliary Transmission Fluid Pump Performance, P068A Mercedes-Benz Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De Energized Performance Too Early, P0440 Toyota EVAP Canister Purge Regulator Valve, C1953 Mazda Master Cylinder Pressure Sensor Circuit Open, P2119 Mercedes-Benz Throttle Actuator Control Throttle Body Range/Performance. DTC P1656 Driver 2 Line 6 After measuring charging voltage at the battery, it was clear that the BCM voltage was correct and the ECM voltage was incorrect. P1159 HO2S Cross Counts Bank 2 Sensor 2 P1161 HO2S Heater Control Circuit Bank 2 Sensor 2 p1518 1 Answer +1 vote answered Jan 28, 2017 by anonymous Best answer Ford used butterfly valves to change the path of the intake air during different running conditions on the motor. Test for voltage on the serial data circuits at the TAC module 16-way harness connector with a DMM. Does the truck start? With Drive Ratio Mechanical problem with the intake manifold or linkage Failed IMRC actuator Wiring problems Faulty PCM What are the symptoms of code P1518? P1288 Accelerator Pedal Position Sensor 3 Circuit High Voltage My Aux Ports Front In Back Are Not Working My Wife Was Driving Back From Her Friends House A Couple Hours Away. (adsbygoogle = window.adsbygoogle || []).push({}); GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation). P1520 Transmission Range Switch Circuit P1521 Transmission Engaged at High Throttle Angle Grounds G103 and G104 (and the body-to-engine ground cable) also ground feed through G105, which proved to be the critical clue in this months Diagnostic Dilemma. You are using an out of date browser. DTC P1503 Theft Deterrent Fuel Enable Signal Not Correct Turn ON the ignition, with the engine OFF. P1133 HO2S Insufficient Switching Bank 1 Sensor 1 All content 2004-2023 OBD-Codes.com. . P1847 2-3 Shift Solenoid Circuit High Voltage DTC P1583 Cruise Direction Circuit High Voltage P1135 HO2S Lean Mean Bank 1 Sensor 1 P1136 HO2S Rich Mean Bank 1 Sensor 1 P1137 HO2S Bank 1 Sensor 2 Lean System or Low Voltage and Took the TB to autozone and got code P1518 Electronic throttle module to PCM Communication. I just put in a new alternator and now when I turn on the air conditioning I lose rpm's and it will shut off when I am at a stoplight or in idle. You can post now and register later. P1163 HO2S Bank 2 Sensor 3 Lean System or Low Voltage have also checked throttle body truck has new engine and new sensors. DTC P1677 Driver 4 Line 7 I have a p1518 code ecm to tac module communication problem, checked wires wires at connections replaced tac module and no luck. - DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. DTC P1600 TCM Internal Watchdog Operation The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1431 Fuel Level Sensor 2 Circuit Performance P1352 IC Output High/Pulse Detected when GND_Cyl. P1190 Engine Vacuum Leak P1191 Intake Air Duct Air Leak P1200 Injector Control Circuit P1201 (Alt. P1138 HO2S Bank 1 Sensor 2 Rich or High Voltage Sounds like a tps, or tps wiring problem. P1398 Wheel Speed Sensor 2 - G - Sensor Circuit High Voltage I am not sure what the problem is. Code P1518 GMC Possible Causes Dead or weak battery Faulty Throttle Actuator Control (TAC) module Throttle Actuator Control (TAC) module harness is ope or shorted Throttle Actuator Control (TAC) module circuit poor electrical connection Check Throttle Actuator Control (TAC) module connector for water DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). Pictures would help, you can upload them using the add image button? DTC P1655 EVAP Purge Solenoid Control Circuit DTC P1602 Knock Sensor (KS) Module Performance So, the heavily painted block surface forces G105 to ground through the corroded threads of the G105 retaining bolt. On and P1118 Engine Coolant Temp. Sensor Performance P1804 Ground Control Relay P1810 TFP Valve Position Switch Circuit P1811 Maximum Adapt and Long Shift P1812 Transmission Over Temperature Condition This diagnostic test monitors the accuracy of the serial data transmitted between the TAC module and the PCM. DTC P1510 Throttle Control System Performance - Throttle Limitation Active It is a common failure, but the vehicle has over 78,000 on it. any help would be appreciated. DTC P1504 Vehicle Speed Output Circuit DTCP1518 sets if the TAC module ignition feed circuit is shorted to a B+ supply circuit. JavaScript is disabled. P1283 Accelerator Pedal Position Sensor 2 Circuit High Voltage High Voltage P1189 Engine Oil Pressure (EOP) Switch Circuit There are some variations among imports such as the Cadillac Catera, which With the mileage you have listed I would suggest to check it for tune up. It may not display this or other websites correctly. So After Cleaning The Throttle Body Electrical Problem DTC P1619 Engine Oil Life Monitor Reset Circuit An inspection of the fuses may lead you to the circuit that is shorted to the TAC module ground circuit. DTC P1561 Cruise Vent Solenoid DTC P1508 Idle Speed Low - Idle Air Control (IAC) System Not Responding P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation P1893 Engine Torque Signal Low Voltage P1894 Engine Torque Signal High Voltage P1895 TCM to ECM Torque Reduction Circuit. P1518 Electronic Throttle Module to PCM Communication; P1519 Throttle Actuator Control (TAC) Module Internal Circuit; . P1217 Fuel Solenoid Response Time Too Long Accurate transmitting and receiving of serial data requires not only good circuit integrity . Your previous content has been restored. DTC P1628 ECT Pull-Up Resistor After 7 hours of hot idling and driving time, the ever-present P1518 DTC had also vanished. DTC P1634 Ignition 1 Switch Circuit Cannot seem to find a common connection as to when or why I can it expect it. You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! Is this transmission? 7 P1525 Throttle Body ServiceRequired P1526 Minimum Throttle Position Not Learned Test both sides of the ETC/ECM fuse with a test lamp connected to ground. If the PCM detects a communication error, DTCP1518 sets. DTC P1529 Heated Windshield Request Problem P1032 HO2S Heater Warm Up Control Circuit Banks 1 and 2 Sensor 1 DTC P1547 A/C System Performance Degraded Hello seen this post and have a similar problem with my 02 Yukon Denali engine code is P1518 but can keep engine running when I get a jump its good for about 3-5 sec then sputters and stalls checked the ground on the back of the engine seems to be connected well not sure what else to be looking for any hep would greatly appreciated. Low Voltage P1673 Engine Hot Lamp Control Circuit P1674 Tachometer Control Circuit P1675 EVAP Vent Solenoid Control Circuit Once the PCM finally comes online and communicates with the TAC module, it logs the P1518 and displays reduced power. P1144 HO2S Bank 1 Sensor 3 Rich or High Voltage P1514 Airflow to TP Sensor Correlation High Test for voltage on the serial data circuit at the TAC module 16-way harness connector with a DMM. onto the 3 Months Ago We Replaced The #2 Coil. DTC P1517 Electronic Throttle Module P1228 Injector Circuit Cylinder 3 Intermittent Refer to. DTC P1637 Generator L-Terminal Circuit P1418 Secondary Air Injection System Relay A Control Circuit The measurement of voltage is like the speed of the traffic. P1602 Knock Sensor (KS) Module Performance DTC P1562 Cruise Vacuum Solenoid Inspect the fuses for the circuits that are in the TAC module harness--i.e. Fuel Economy, Hybrids & Electric, Car Repairs, Recalls And More. Refer to. DTC P1571 Traction Control Torque Request Circuit If the PCM detects a communication error, DTC P1518 sets. And, with the added loads of the engine oil level switch, intake air temperature sensor, and park/neutral position switch, could a frayed ground wire cause an intermittent failure of the ECM? Includes diagnostic enhancements for P1518." Test the TAC side of the fuse terminal for continuity to ground with a DMM. P1817 TFP Valve Position Sw. - Reverse With Drive Ratio P0000-P0900 P1000-P1500 . This type of fretting may be caused by vibration, thermal cycling and/or poor connection/terminal retention. P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage On low current signal circuits, this condition may cause high resistance, resulting in intermittent connections. DTC P1693 Tachometer Circuit Low Voltage make sure starting system & charging system are functioning properly. What needs to be done is to have the computer scanned to determine what trouble codes are stored in the computer. DTC P1635 5 Volt Reference Circuit DTC P1530 Throttle Actuator Control (TAC) Module Internal Circuit DTC P1622 Cylinder Select P1421 Intake Air Low Pressure Switch Circuit High Voltage P1120 Throttle Position (TP) Sensor 1 Circuit My stereo system, e fans and ac are killin it.When I shut evry thing off there is no codes. DTC P1642 Vehicle Speed Output Circuit We had put some oil in before we left on the trip because it was low I have only had this truck for about three months and before I chuck out any more cash I would like to get an idea of what to ask when I go to a repair person because I have been burned by mechanics before (I am a female). P1260 Last Test Failed Failed SCC ENTER:More Info. and DTC P1558 Cruise Control Servo Indicates Low P1164 HO2S Bank 2 Sensor 3 Rich or High Voltage DTC P1603 Loss of SDM Serial Data DTC CODES - P1500-P1700. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). Ckt. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! P1397 Wheel Speed Sensor 2 - G - Sensor Circuit Low Voltage Did you perform the Diagnostic System Check-Engine Controls? or I did not clear the code, but when I went to restart the truck again, no CEL, no messages, and no reduced power - drove it 1/4 mile down the road, and it ran fine. DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit. P1546 A/C Clutch Status Circuit Low Voltage Wow, thank you so much. Additionally, there were random U1000 codes, ABS codes, etc. I recently got it running/driving and started tuning the idle and such. P1450 Barometric Pressure Sensor Circuit If there are any nationally recognized parts stores near you (Auto Zone, Advance) call and ask if they lend scanners. P1570 Traction Control Active - Cruise Control Disabled I got a pump for $210.00 on Amazon and it took a day but I got it done runs great! Two DTCs appeared: P1515 (variation between commanded and actual throttle position) and P2135 (TP2 disagrees with TP1 by more than 7.5%). P1852 Brake Band Apply SolenoidLow Voltage P1211 Mass Air Flow Circuit Intermittent High P1518 Electronic Throttle Module to PCM Communication I have a 1961 C-10 that I recently swapped a built 5.3/ NV3500 5 speed into. P1221 Fuel Pump Secondary Circuit Low P1222 Injector Control Circuit Intermittent P1119 ECT Signal Out-Of-Range With TFT Sensor P1545 Air Conditioning (A/C) Clutch Relay Control Circuit P1361 Ignition Coil Control Circuit Low Voltage P1451 Barometric Press. DTC P1682 Driver 5 Line 2 P1642 Vehicle Speed Output Circuit P1643 Engine Speed Output Circuit P1644 Traction Control Delivered Torque Output Circuit The power your car's engine is producing is important. Powertrain Control Module (PCM) Replacement DTC P1606 Serial Communication Problem With Device 6 . and passes. Well, sorry that there were no responses to this, BUT - problem solved! DTC P1501 Theft Deterrent System. P1559 Cruise Control Power Management Mode P1237 Injector Circuit Cylinder 6 Intermittent Switching Bank 1 Sensor 2 P1689 - No Communication Between ECM and Injection Pump Module P1690 - Fuel injection pump crankshaft position sensor Does Not Agree With ECM crankshaft position Sensor It Reset The Pcm. Adding a stainless steel star washer can be a plus. Observe the Capture Info with a scan tool. When the TAC module detects a problem within the TAC system, more than 1 TAC system related DTC may set. P1588 Cruise Control Clutch Control Circuit High Fortunately for us, the Yukon went into Reduced Power mode before leaving the parking lot on its first test drive. The vehicle blows black smoke and leaks water from exhaust. The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC) . The TAC module stays powered-up when the ignition switch is turned OFF. P1276 Accelerator Pedal Position Sensor 1 Circuit Performance Fuel) Gas Mass Sensor Circuit Range/Performance P1376 Ignition Ground Circuit P1377 IC Cam Pulse To 4X Reference Pulse 1 DTC. P1689 - No Communication Between ECM and Injection Pump Module; P1690 - Fuel injection pump crankshaft position sensor Does Not Agree With ECM crankshaft position Sensor; P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent It is always a good idea to purchase a good extended warranty on any new vehicle you plan on keeping past the original warranty period. An improperly torqued TAC module ground may be at fault. Please help me if you can with my problem and help me avoid being taken advantage of again I am on a very tight budget and I miss driving my car. Does the DMM indicate voltage on both circuits above the specified value? A current DTC, Last Test Failed, clears when the diagnostic runs When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 03 2500hd 2wd auto 6.0 litre. A DTC P1518 was stored in the history codes, which my clients shop diagnosed as a bad ignition switch. My truck was riding fine on a trip suddenly we started to lose power. In fact way too many people have posted on this subject. Use only a clean nylon brush that is dedicated to the repair of the conditions. P1372 Crankshaft Position (CKP) Sensor A-B Correlation An improperly torqued TAC module ground may be at fault. DTC P1577 BBV Sensor Ckt. Sens. P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). DTC P1690 ECM Loop Overrun Do not replace the control module, wiring or component for intermittent problems that cannot be duplicated. So, how could cleaning the engine block ground solve the P1515 and P2135 DTCs and the Reduced Power mode? Low Voltage P1188 EOT Sensor Ckt. and P1281 Accelerator Pedal Position Sensor 2 Circuit Performance This serial data circuit is separate from any other serial data circuit on the vehicle. Drives fine on level ground, but when accelerate uphill, loses power. DTCP1518 sets because no communication is detected by the TAC module from the PCM. Diagnostic Trouble Code (DTC) List, Powertrain Control Module (PCM) Connector End Views, Diagnostic System Check - Engine Controls, DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610, Testing for Intermittent Conditions and Poor Connections, Throttle Actuator Control (TAC) Module Replacement, Powertrain Control Module (PCM) Replacement. DTC P1665 Driver 3 Line 5 Was the battery disconnected? When you step on the gas Sens. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. P1322 EI System or Ignition Control Extra or Missing DTC P1542 A/C System High Pressure High Temperature DTC P1554 Cruise Control Feedback Circuit DTC P1605 Loss of HVAC Serial Data P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. High Voltage DTC P1563 Cruise Vehicle Speed/Set Speed Difference Too High Friday, September 7th, 2018 AT 5:48 PM An improperly torqued TAC module ground may be at fault. P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage P1835 Kick-Down Switch Circuit P1836 Kick-Down Switch Failed Open P1837 Kick-Down Switch Failed Short P1842 1-2 Shift Solenoid Circuit Low Voltage It has stalled out once or twice but it turns right back on. DTC P1621 Control Module Long Term Memory Performance P1404 Exhaust Gas Recirculation (EGR) Closed Position DTC P1695 Remote Keyless Entry Circuit Low The answer lies in Ohms Law. Just seems like it has a lack of power. Condition/Concern: Customers may have a concern of lack of power and engine light on. Test for a short to voltage on both serial data circuits at the TAC module 16-way connector with a DMM. But, the logic is simple: the ECM commands the starter relay to crank the engine and, with the exception of the voltmeter being sourced from the ignition switch, the operating information displayed on the instrument cluster is relayed to the cluster via a data bus from the ECM. DTC P1654 Cruise Control Inhibit Output Circuit P1381 Misfire Detected - No Communication with Brake Control To avoid tying up a service bay with more diagnostics, I drove the Yukon in limp mode to my own shop, which allowed me to pursue the diagnosis at a more leisurely pace. P1300 Ignitor Circuit The Fora platform includes forum software by XenForo. in P1567 Active Banking Control Active - Cruise Control Disabled DTC P1686 Driver 5 Line 6 The battery negative-to-block ground G105 not only grounds the starter and alternator, it must also ground G103 and G104, which makes it the most critical and most load-sensitive ground on the whole vehicle. DTC P1612 Loss of IPM Serial Data, DTC P1613 Loss of DIM Serial Data P1531 A/C Low Side Temperature Sensor Fault Repairing Connector Terminals The Yukons ECM shares ground G103 at the right cylinder head with the engine oil level switch, intake air temperature sensor, and park/neutral position switch. P1622 Cylinder SelectP1623 Transmission Temp Pull-Up Resistor P1391 Wheel Speed Sensor 1 - G - Sensor Circuit Performance P1031 HO2S Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 4 P1624 Customer Snapshot Requested - Data Available P1141 HO2S Heater Control Circuit Bank 1 Sensor 2 Share. Switch Circuit Low S103 terminates into a single wire that is grounded to the rear of the right-hand cylinder head at G103. Cause: This condition may be caused by a buildup of nonconductive insulating oxidized debris (known as fretting corrosion) occurring between two electrical contact surfaces of the connection or connector. Thanks, I Am Only Able To Drive 20-30 Mph. Switch Circuit High On high current power circuits, this condition may cause permanent increases in the resistance and may cause a device to become inoperative. * P1418 Secondary Air Injection System Relay A Control Circuit High * P1420 Intake Air Low Pressure Switch Circuit Low Voltage * P1421 Intake Air Low Pressure Switch Circuit High Voltage * P1423 Intake Air High Pressure Switch Circuit High Voltage * P1431 Fuel Level Sensor 2 Circuit Performance * P1432 Fuel Level Sensor 2 Circuit Low Voltage Testing for Intermittent Conditions and Poor Connections P1358 IC Output High/Pulse Detected when GND_Cyl. P1354 IC Output High/Pulse Detected when GND_Cyl. Here are 11 steps to help clean any cars engine compartment. DTC P1627 A/D Performance DTC P1582 Cruise Direction Circuit Low Voltage P1864 Torque Converter Clutch Circuit P1868 Transmission Fluid Life P1870 Transmission Component Slipping P1871 Undefined Gear Ratio P1873 TCC Stator Temp. DTC P1626 Theft Deterrent Fuel Enable Signal Not Received Important:If the Driver Information Center is displaying Reduced Engine Power, go to step 6. An improperly torqued TAC module ground may be at fault. For a better experience, please enable JavaScript in your browser before proceeding. What does it period, beside giving a CODE? I have read a lot of problems on the net with them. Will Chevrolet stand by their car when I know I am not the only one to experience exactly this problem? P1109 Secondary Port Throttle System DTC P1660 Cooling Fan Control Circuits