Surprisingly, after the new ECM was installed, the TAC module immediately went into the Reduced Power mode as the ignition was turned on. You may have a vacuum leak, get a can of spray Gumout, spray the vacuum lines and manifold area, when the idle changes, you have found the leak! Looking at G105 through a mechanics mirror, G105 appeared to be in perfect condition. Have the codes read? P1608 Serial Communication Problem With Device 8 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. P1228 Injector Circuit Cylinder 3 Intermittent DTC P1532 A/C Evaporator Temp. Inspect the TAC module connectors for signs of water intrusion. Wow, thank you so much. From my manual: P1518 - Electronic Throttle Module to PCM Communication This seems to indicate that there is a communication problem between the two modules. DTC P1623 Transmission Temp Pull-Up Resistor DTC P1580 Cruise Move Circuit Low Voltage The Ecm B Fuse Keeps Blowing And I Saw That Some One Had A Similar Problem Back In 2011. DTC P1615 Loss of VTD Serial Data What could be the problem? While G105 appears fully functional, its a bad ground with a loose retainer bolt that is highly susceptible to electrical load. Depending on the polarity of the throttle actuator motor transistors, this DTC may not set with a fault in the Clear the MIL and the DTC with a scan tool. var url = 'obd\u002Dcodes.com'; Recently in the past couple weeks I have noticed that when I get on the gas and any speed the truck seems to hesitate all the way through accelerating and even at steady speeds on the highway. P1819 Internal Mode Switch - No Start\Wrong Range It may be necessary to preform clear codes function twice to clear this DTC. DTC P1508 Idle Speed Low - Idle Air Control (IAC) System Not Responding P1361 Ignition Coil Control Circuit Low Voltage After removing G105, I found the block surface coated with heavy black paint and the threads of the retaining bolt heavily corroded. Adding a stainless steel star washer can be a plus. Circuit Testing DTC P1582 Cruise Direction Circuit Low Voltage P1576 BBV Sensor Ckt. DTC P1614 Loss of RIM Serial Data And, we also know that accessory load across a fixed resistance can be a major variable. Disconnect the PCM connector that contains the TAC module serial data circuits. P1518 Electronic Throttle Module to PCM Communication; P1519 Throttle Actuator Control (TAC) Module Internal Circuit; . P1817 TFP Valve Position Sw. - Reverse With Drive Ratio But, making more power with less displacement puts more stress on the engine. P1372 Crankshaft Position (CKP) Sensor A-B Correlation sets. It has stalled out once or twice but it turns right back on. GM General Motors OBD-II Trouble Codes Will Chevrolet stand by their car when I know I am not the only one to experience exactly this problem? DTC P1566 Engine RPM Too High - Cruise Control Disabled Ckt. 03 2500hd 2wd auto 6.0 litre. Refer to I have the same problem with my 2003 TB as below. I replaced fan clutch Refer to. P1565 Cruise Servo Position Sensor P1566 Engine RPM Too High - Cruise Control Disabled DTC P1631 Theft Deterrent Start Enable Signal Not Correct (Replacing the ECM is also included in step 27 of the 29-step diagnostic process required to correct a P1518 trouble code.) P1545 Air Conditioning (A/C) Clutch Relay Control Circuit Finally, at this point in the diagnosis, replacing the ECM appeared to be a cheaper option than spending countless diagnostic hours chasing ghost trouble codes.
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