Error code
OBD2 P0377
OBD2P0377
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Timing Reference High Resolution Signal 'B' Too Few Pulses.
Severity
moderateCan drive, but performance may be affected and engine misfires could occur.
Summary
P0377 indicates that there are too few pulses in the high-resolution timing reference signal B, which is related to engine timing sensors or wiring issues.
Common Causes
- Wiring issue
- CKP/RPM/CMP sensor failure
- ECM (Engine Control Module) malfunction
Fixes
- Replace faulty CKP/RPM/CMP sensor or repair wiring issues.
FAQ
What does P0377 mean?
It means there are too few pulses in the high-resolution timing reference signal B, likely due to a problem with the engine's crankshaft position (CKP), camshaft position (CMP), or RPM sensor.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0300Random/Multiple Cylinder Misfire Detected
- P0301Cylinder 1 Misfire Detected
- P0302Cylinder 2 Misfire Detected
- P0303Cylinder 3 Misfire Detected
- P0304Cylinder 4 Misfire Detected
- P0305Cylinder 5 Misfire Detected
- P0306Cylinder 6 Misfire Detected
- P0307Cylinder 7 Misfire Detected
- P0308Cylinder 8 Misfire Detected
- P0309Cylinder 9 Misfire Detected
- P0310Cylinder 10 Misfire Detected
- P0311Cylinder 11 Misfire Detected