OBD-II code · Powertrain (generic)
P0372 Timing Reference High Resolution Signal A Too Few Pulses
Timing reference signal A delivers fewer pulses per crank revolution than expected — broken reluctor teeth, sensor air gap too wide, or tone wheel chipped.
Is it safe to drive with P0372?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyTone wheel teeth broken or sensor gap excessive
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Crankshaft Position Sensor, Flywheel
Related codes
- P0370Timing Reference High Resolution Signal A
- P0377Timing Reference High Resolution Signal B Too Few Pulses
- P036FIgnition H Control Signal Circuit High
- P0371Timing Reference High Resolution Signal A Too Many Pulses
- P0373Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
- P0374Timing Reference High Resolution Signal A No Pulses
- P0375Timing Reference High Resolution Signal B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.