P0373
PowertrainCrankshaft Camshaft Positionmoderate severityTiming Reference High Resolution Signal A Intermittent/Erratic Pulses
What P0373 Means
The PCM detected intermittent or erratic high resolution timing pulses on signal A. This can cause sporadic timing errors and drivability problems.
Symptoms
- Intermittent check engine light
- Occasional stalling
- Erratic performance
Common Causes
- Loose connector or wiring
- Damaged tone ring
- Faulty timing sensor
- Intermittent ground fault
Diagnostic Steps
- Scan for codes and freeze frame
- Wiggle-test harness while monitoring
- Inspect tone ring and air gap
- Replace sensor if faulty
🔌 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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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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