What does the codes P 0758, P 1680 and P 0502 mean for 2002 Cavalier.

Question

My car is automatic and it will not shift up, I can only get to 35 mph.

Answer 1

I think you may have a bad transmission and an issue with the ECM or wiring issue.

p1680

- Engine Control Module (ECM) programm error
- Wrong Engine Control Module (ECM)
- Faulty Engine Control Module (ECM)
 

p0758

- Low transmission fluid level
- Dirty transmission fluid
- Faulty 2-3 Shift Solenoid Valve
- 2-3 Shift Solenoid Valve harness or connectors
- 2-3 Shift Solenoid Valve circuit is open or shorted
 

p0502

- Faulty Vehicle Speed Sensor
- Vehicle speed sensor harness or connectors is open or shorted
- Vehicle speed sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)