P0371moderate severityPowertrain
Timing Reference High Resolution Signal A Too Many Pulses
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM received more high resolution timing pulses than expected on signal A. This often indicates electrical noise or a damaged tone ring.
Symptoms
- Check engine light on
- Rough running
- Timing-related performance issues
Common causes
- Damaged reluctor/tone ring
- Electrical interference or noise
- Faulty timing sensor
- Wiring fault
Diagnostic steps
- Scan for codes and freeze frame
- Inspect tone ring for damage or debris
- Check wiring for noise sources
- Test and replace sensor if needed
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