P0702high severityPowertrain
Transmission Control System Electrical
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detected an electrical fault in the transmission control system. This can cause erratic shifting or transmission limp mode.
Symptoms
- Harsh or erratic shifting
- Transmission limp mode
- Check engine light on
Common causes
- Wiring or connector fault in transmission circuit
- Failed transmission solenoid
- Internal TCM fault
- Poor ground connection
Diagnostic steps
- Scan and confirm P0702 code
- Inspect transmission wiring and connectors
- Test transmission solenoids and sensors
- Check TCM power and ground circuits
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P0033
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