OBD-II code · Powertrain (generic)
P0370 Timing Reference High Resolution Signal A
A general electrical fault on the high-resolution timing reference signal A — used by ignition and injection systems for precise crank angle measurement (typically a 60-2 or 36-1 tone wheel signal).
Is it safe to drive with P0370?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor or signal path failed
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Crankshaft Position Sensor
Related codes
- P0375Timing Reference High Resolution Signal B
- P036DIgnition H Control Signal Circuit/Open
- P036EIgnition H Control Signal Circuit Low
- P036FIgnition H Control Signal Circuit High
- P0371Timing Reference High Resolution Signal A Too Many Pulses
- P0372Timing Reference High Resolution Signal A Too Few Pulses
- P0373Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.