Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble reading a signal from the engine that helps it know when to fire the spark plugs. It's like trying to watch a movie with a scratched DVD; the computer can't get a clear picture.
The P0375 code indicates a problem with the high-resolution timing reference signal, which is crucial for the engine's ignition timing.
The P0375 code is triggered when the Engine Control Module (ECM) detects an issue with the high-resolution timing reference signal B. This signal is used by the ECM to determine the precise position of the crankshaft and camshaft for optimal ignition and fuel injection timing.
• Check Engine Light is on
• Engine misfires
• Poor engine performance
• Difficulty starting the engine
• Faulty crankshaft position sensor
• Damaged or corroded wiring or connectors
• Faulty camshaft position sensor
• ECM malfunction
ECM: Engine Control Module, the computer that controls the engine.
Crankshaft Position Sensor: A sensor that monitors the position and rotational speed of the crankshaft.
• Use an OBD-II scanner to verify the code.
• Inspect the crankshaft and camshaft position sensors for damage.
• Check the wiring and connectors for corrosion or damage.
• Test the ECM for proper function.
• Replace the faulty crankshaft position sensor.
• Repair or replace damaged wiring or connectors.
• Replace the faulty camshaft position sensor.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
• Screwdriver set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Pontiac Grand Prix
• Regularly inspect and maintain engine sensors.
• Keep electrical connections clean and secure.
• Perform regular engine diagnostics.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved.
• Consult a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for warranty coverage on engine sensors.
This code has been associated with sensor failures in vehicles with high mileage or poor maintenance history.
Moderate – While the vehicle may still run, ignoring this issue can lead to more severe engine problems.
Driving with a faulty timing reference signal can lead to engine damage and increased emissions.
• Engine at operating temperature
• Vehicle in a safe and controlled environment
The crankshaft position sensor is typically located near the bottom of the engine, while the camshaft position sensor is located near the top of the engine.
Q: Can I drive my car with a P0375 code?
A: It's not recommended to drive with this code, as it can lead to engine damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspection of engine sensors can help prevent this code.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.