P0377: Timing Reference High Resolution Signal B Too Few Pulses
MediumPowertrainValve Timing
What does P0377 mean?
P0377 is a diagnostic trouble code indicating "Timing Reference High Resolution Signal B Too Few Pulses". This code relates to your vehicle's valve timing and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Faulty valve timing component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0377 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.