P0375
Timing Reference High Resolution Signal "B"
- Severity
- Medium
- Driving
- Drivable — book it in
A fault in the high-resolution timing reference signal "B". Some engines use an extra, finer-grained timing signal on top of the main crankshaft signal, so the module can place ignition and injection more precisely. Losing it does not usually stop the engine, but it does force the module to work with less information.
Possible causes
- CommonFailed timing reference sensor
- CommonDamaged or contaminated trigger wheel
- CommonCorroded connector or damaged wiring
- PossibleMetal debris on the sensor tip
- PossibleInterference from a nearby high-voltage component
- PossibleStretched timing chain changing the signal relationship
What you might notice
- Rough running or misfire
- Reduced power
- Hard starting
- Check engine light on
- Poor fuel economy
What to check, in order
- Read all codes. Crankshaft and camshaft codes alongside these point at timing rather than at this sensor.
- Inspect the connector and wiring for corrosion, chafing and heat damage.
- Inspect the sensor tip for debris and the trigger wheel for damage.
- Check the harness routing. This is a fine-resolution signal and it is more vulnerable to interference than most, so a lead re-routed against an ignition component can cause it.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Ignition system or misfire
P0300P0301P0302P0303P0304P0305P0306P0307P0308P0309P0310P0311P0312P0313P0314P0315P0316P0317P0318P0319P0320P0321P0322P0323P0324P0325P0326P0327P0328P0329P0330P0331P0332P0333P0334P0335P0336P0337P0338P0339P0340P0341P0342P0343P0344P0345P0346P0347P0348P0349P0350P0351P0352P0353P0354P0355P0356P0357P0358P0359P0360P0361P0362P0363P0364P0365P0366P0367P0368P0369P0370P0371P0372P0373P0374P0375P0376P0377P0378P0379P0380P0381P0382P0383P0384P0385P0386P0387P0388P0389P0390P0391P0392P0393P0394