P0375moderate severityPowertrain
Timing Reference High Resolution Signal B Malfunction
on 2021 BMW X3 xDrive30i 2.0L I4 Turbo B48 · AWD
What this code means
The PCM detected a malfunction in the high resolution timing reference signal B. This affects the accuracy of ignition and injection timing.
Symptoms
- Check engine light on
- Poor engine performance
- Rough idle or misfire
Common causes
- Faulty timing reference sensor
- Wiring or connector fault
- Damaged tone ring
- Faulty PCM
Diagnostic steps
- Retrieve trouble codes and freeze frame
- Inspect sensor wiring and connectors
- Check tone ring for damage
- Test sensor output and replace if needed
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Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1