Flash: 2.4L Powertrain Diagnostic And System Enhancements
This bulletin involves reprogramming the Engine Control Module (ECM) with the latest
available software.
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation the technician may find the following Diagnostic
Trouble Codes (DTCs) stored in the ECM memory:
· **P050D - Cold Start Rough Idle.
· P0101 - Mass Air Flow Sensor "A" Circuit Performance.
· P0335 - Crankshaft Position Sensor Circuit.
· P1CEC - Variable Valve Solenoid Valve Cold Start Closing Position 1 Timing
Over-Retard.
· P1CED - Variable Valve Timing Solenoid Valve Cold Start Closing Position Timing
Over-Advance.
· P1607 - PCM Internal Shutdown Timer Rationality.
· P0128 - Thermostat Rationality.
· P2610 - PCM Internal Engine Off Timer Performance.
· P0440 - General EVAP System Failure.
· P0441 - EVAP Purge System Performance.
· P0456 - EVAP System Small Leak.
· P0455 - EVAP System Large Leak.
· P0452 - EVAP Pressure Switch Stuck Closed.
· P0133 - O2 Sensor 1/1 Slow Response.
· C0501 - Wheel Speed Signal Left Front Rationality.
· C0507 - Wheel Speed Signal Right Front Rationality.
· C050D - Wheel Speed Signal Left Rear Rationality.
· C0513 - Wheel Speed Signal Right Rear Rationality.
· U0428-00 - Implausible Data Received From Steering Angle Sensor Module.
· C0061 - Lateral Acceleration Sensor.**
· U0402 - Implausible Data Received From TCM.
· P0133 - O2 Sensor 1/1 Slow Response.
· P050D - Cold Start Rough Idle.
In addition, customers may experience one or more of the following concerns:
· RPM flare at cold start.
· Less than desired idle performance.
· Cold engine RPM surge with gear engagement.
