"FLASH: POWERTRAIN DIAGNOSTIC AND SYSTEM IMPROVEMENTS
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 THE FOLLOWING DTCS SET IN THE PCM MEMORY:
· **P1066 - CYLINDER 1 OIL SUPPLY SOLENOID VALVE SWITCH OFF TIME OUT OF RANGE.
· P1068 - CYLINDER 2 OIL SUPPLY SOLENOID VALVE SWITCH OFF TIME OUT OF RANGE.
· P106A - CYLINDER 3 OIL SUPPLY SOLENOID VALVE SWITCH OFF TIME OUT OF RANGE.
· P106C - CYLINDER 4 OIL SUPPLY SOLENOID VALVE SWITCH OFF TIME OUT OF RANGE.**
· P1185 - GENERAL PRESSURE SENSOR CORRELATION.
· P0335 - CRANKSHAFT POSITION SENSOR CIRCUIT.
· P050D - COLD START ROUGH IDLE.
· P0456 - EVAP SYSTEM SMALL LEAK.
· P0133 - O2 SENSOR 1/1 SLOW RESPONSE (ADDITIONAL ENHANCEMENTS).
· P2610 - PCM INTERNAL ENGINE OFF TIMER PERFORMANCE.
· P1607 - PCM INTERNAL SHUTDOWN TIMER RATIONALITY.
IN ADDITION TO THE ABOVE DTCS, THIS SOFTWARE RELEASE ALSO INCLUDES THE FOLLOWING:
· A “CLUNK FEELING"" WHEN DEPRESSING THE GAS PEDAL AFTER A COASTING MANEUVER WHEN
DECEL FUEL SHUT OFF (DFSO) IS ENABLED AND IS EXITING DURING PEDAL TIP-IN.
· FALSE READING THAT THE ENGINE IS OVERHEATING BASED ON THE ENGINE OIL TEMP GAUGE
READ OUT.
· IMPROVED AMBIENT TEMPERATURE SENSOR DIAGNOSTICS DURING SUNLOAD.
· DISABLE MISFIRE MONITOR WHEN P0335 (CRANKSHAFT POSITION SENSOR CIRCUIT) IS PRESENT.
· ENGINE OIL TEMPERATURE GAUGE LEVEL RECALIBRATION TO AVOID THE MISPERCEPTION OF AN
ENGINE OVERHEATING CONDITION."
