There is no TCM in sunfire only truck have a TCM
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PCM and engine soon light flashing cause of misfire engine ....retrieve code and you see P0300 or P0301 or P0302 or P0303 or P0304 .the last number is for the cylinder number misfire and the P0300 for multiple misfire
hope it help
EVAP System Small Leak Detected
Possible Causes:
Fuel tank cap is damaged, loose or the wrong part number.Small leak present somewhere in the EVAP system. Trouble Code: P0700
Automatic Transmission Control System Malfunction
Possible Causes:
The presence of this code means the TCM detected a problem.TCM related Sensor has solenoid is damaged or has failed.This code is for information only - check for other TCM codes.TCM or PCM has failed. CODE P1521 IS WRONG OIL TYPE.DID YOU DO THAT?
Malfunction Indicator Lamp Circuit Malfunction (TCM)
Possible Causes:
MIL control circuit is shorted to ground.Check the TCM for any trouble codes in memory that are responsible for the request to turn on the MIL.TCM has failed.Trouble Code: P1780
Engine Torque Signal Circuit Malfunction
Possible Causes:
.Perform the Diagnostic System Check for the Engine Controls.TCM needs to be replaced.Trouble Code: P1795
Throttle Plate Position Invalid Data Received
Possible Causes:
Perform the Diagnostic System Check for the Engine Controls.TCM may need to be replaced to repair this trouble code.Trouble Code: P2176
Throttle Position Sensor Minimum Position Not Detected
Possible Causes:
TAC motor control circuit (one or more) open or shorted to B+.TAC motor control circuit (one or more) shorted to ground.Throttle valves not at the "rest" position.Throttle valve are binding open, or are binding closed.Throttle valves moving open or closed without spring pressure.TP connector is damaged, open or shorted.Throttle body assembly is damaged or it has failed.PCM has failed.Couldn't find code P1779.
No Camshaft Position Sensor Circuit Failure
Possible Causes:
CMP Sensor connector is damaged, open or it is shorted.CMP Sensor signal circuit is open or shorted to ground or to battery voltage or 5v supply circuit.CMP Sensor 5v supply circuit is open or shorted to ground or to battery voltage.CMP Sensor ground circuit is open.CMP Sensor is damaged or has failed.CKP Sensor is damaged or has failed.PCM has failed.Trouble Code: P0700
Automatic Transmission Control System Malfunction
Possible Causes:
.The presence of this code means the TCM detected a problem.TCM related Sensor has solenoid is damaged or has failed.This code is for information only - check for other TCM codes.TCM or PCM has failed.Sorry but the PO620 is not listed.
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