OBD-II code · Powertrain (generic)
P0371 Timing Reference High Resolution Signal A Too Many Pulses
Timing reference signal A delivers more pulses per crank revolution than expected — typically electrical noise, missing reluctor gap, or wrong tone wheel.
Is it safe to drive with P0371?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyWrong tone wheel or electrical noise
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
- P0376Timing Reference High Resolution Signal B Too Many Pulses
- P036EIgnition H Control Signal Circuit Low
- P036FIgnition H Control Signal Circuit High
- P0372Timing Reference High Resolution Signal A Too Few Pulses
- P0373Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
- P0374Timing Reference High Resolution Signal A No Pulses
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.