Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is getting too many signals from a part that helps it know when to fire the engine's spark plugs. It's like getting too many messages at once and getting confused.
The engine control module (ECM) is detecting more pulses than expected from the high-resolution timing reference signal A, which indicates an issue with the signal's integrity or the sensor providing it.
P0371 indicates that the ECM has detected an excessive number of pulses from the high-resolution timing reference signal A. This signal is crucial for precise engine timing and is typically generated by a crankshaft or camshaft position sensor. An excess of pulses can lead to incorrect timing calculations, affecting engine performance.
• Check Engine Light illuminated
• Engine misfires
• Poor acceleration
• Faulty crankshaft or camshaft position sensor
• Damaged or corroded wiring or connectors
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check for any stored codes and freeze frame data.
• Inspect the wiring and connectors for damage or corrosion.
• Test the crankshaft and camshaft position sensors for proper operation.
• Replace faulty crankshaft or camshaft position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wiring diagram
$100 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain engine sensors.
• Ensure wiring and connectors are clean and secure.
• Perform routine engine diagnostics.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on engine sensors and ECM.
This code has been associated with sensor failures and wiring issues in various vehicle models over the years.
Moderate – Addressing this issue promptly can prevent further engine performance problems.
Ignoring this issue may lead to increased emissions and potential engine damage, which could affect vehicle safety and compliance with emissions regulations.
• Engine running at idle
• Engine under load
The crankshaft or camshaft position sensor is typically located near the engine's crankshaft or camshaft.
Q: Can I drive with a P0371 code?
A: It's not recommended to drive with this code as it can lead to engine performance issues and potential damage.
Q: How do I clear a P0371 code?
A: After repairing the issue, use an OBD-II scanner to clear the code. If the problem persists, the code may return.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.
View options on Amazon
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.