P0371
PowertrainCrankshaft Camshaft Positionmoderate severityTiming Reference High Resolution Signal A Too Many Pulses
What P0371 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
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
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SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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