P0370
PowertrainCrankshaft Camshaft Positionmoderate severityTiming Reference High Resolution Signal A Malfunction
What P0370 Means
The PCM detected a malfunction in the high resolution timing reference signal A. This signal is critical for accurate ignition and injection timing.
Symptoms
- Check engine light on
- Poor engine performance
- Misfires or rough idle
Common Causes
- Faulty timing reference sensor
- Wiring or connector fault
- Damaged reluctor/tone ring
- Faulty PCM
Diagnostic Steps
- Retrieve trouble codes and freeze frame
- Inspect sensor wiring and connectors
- Check tone ring for damage
- Test sensor output and replace 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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