Flash: Powertrain Diagnostic And System Enhancements
This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest
available software.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find that the following Diagnostic Trouble Codes (DTCs)
have been set:
· **P0456 - EVAP System Small Leak.
· P0441 - EVAP Purge System Performance.
· P0335 - Crankshaft Position Sensor Circuit.
· P0133 - O2 Sensor 1/1 Slow Response.
· P2610 - PCM Internal Engine Off Timer Performance.
· P1607 - PCM Internal Shutdown Timer Rationality.**
· P0506 - Idle Speed Performance Lower Than Expected.
· P0507 - Idle Speed Performance Higher Than Expected.
· U0402 - Implausible Data Received From TCM - (Transmission Control Module).
· P0171 - Fuel System 1/1 Lean.
· P050D - Cold Start Rough Idle.
In addition, the following software enhancements are available:
· Increased RPM on start up.
· Reduced RPM when shifted into drive or reverse when cold.
