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1995 Buick Park Avenue Ultra 3.8L MIL Lamp on
Replaced leaking vacuum lines and O2 sensor which showed bad. Went through diagnostic flow chart, points to PCM. Replaced PCM still has code. Tested all wiring to sensors (Boost solenoid, TCC, EVAP solenoid). Tested all powers and grounds. Unplugged solenoids,...
FIX posted 6/16/2005
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Related Documents & Media | VIN | 1G4CU5218S |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Hot, on Accel |
Trouble Codes
| P1640 | Output Driver Module 'A' Circuit Malfunction |
Message Closed
Vehicle Data
1995 Buick Park Avenue Ultra
| VIN | 1G4CU5218S |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Hot, on Accel |
Trouble Codes
| P1640 | Output Driver Module 'A' Circuit Malfunction |
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