• Check Engine Light illuminated
• Poor engine performance
• Engine misfires
• Faulty crankshaft position sensor
• Damaged or corroded wiring or connectors
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnostics and reporting
• P0376
• P0378
Timing Reference High Resolution Signal B Too Few Pulses
Your car's computer isn't getting enough signals from a part that helps it know when to fire the engine's spark plugs. It's like trying to clap your hands to a song but missing some beats.
The engine control module (ECM) is not receiving the expected number of pulses from the high-resolution timing reference signal B, which is used to determine the precise timing for engine operations.
The P0377 code indicates that the ECM has detected an insufficient number of pulses from the timing reference high-resolution signal B. This signal is crucial for the ECM to accurately control the ignition and fuel injection timing. A lack of pulses can lead to improper engine timing, affecting performance and efficiency.
• Use an OBD-II scanner to confirm the code.
• Inspect the crankshaft position sensor and its wiring.
• Test the ECM for proper operation.
• Replace the crankshaft position sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Pontiac Grand Prix
• Regularly inspect and maintain engine sensors.
• Ensure connectors and wiring are free from corrosion.
• Perform routine engine diagnostics.
Sensor Issue
• Avoid driving long distances until the issue is fixed.
• Have your vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer for specific warranty coverage on engine sensors.
This code has been associated with sensor failures in older vehicles, particularly those with high mileage.
Moderate – It should be addressed soon to avoid engine performance issues.
Ignoring this code can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle stationary
The crankshaft position sensor is typically located near the bottom of the engine block, close to the crankshaft pulley.
Q: Can I drive my car with a P0377 code?
A: It's not recommended to drive long distances, as it can lead to engine performance issues.
Q: How do I reset the check engine light after fixing the issue?
A: You can use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
