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 has detected a problem with one of the sensors that helps the engine know the position of the camshaft. It's like when you can't find your toy because the lights are off.
The P0393 code indicates that the signal from the camshaft position sensor B on bank 2 is higher than expected.
The camshaft position sensor monitors the position of the camshaft and sends this information to the engine control module (ECM). If the ECM detects a signal voltage from sensor B on bank 2 that is higher than the specified range, it triggers the P0393 code.
• Check Engine Light is on
• Engine may run rough or misfire
• Poor acceleration
• Faulty camshaft position sensor
• Wiring issues such as short circuits or open circuits
• Faulty ECM
Camshaft: A shaft in the engine that controls the opening and closing of the intake and exhaust valves.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the camshaft position sensor with a multimeter.
• Replace the camshaft position sensor.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance and inspection of wiring and connectors.
• Timely replacement of faulty sensors.
• Avoiding exposure of sensors to extreme conditions.
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle diagnosed and repaired promptly to avoid further damage.
Check with your vehicle manufacturer or warranty provider for coverage details.
This code is commonly associated with sensor failures or wiring issues in vehicles with higher mileage.
Moderate – It's important to address this issue soon to prevent potential engine performance problems.
Driving with a faulty camshaft position sensor can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle stationary
The camshaft position sensor is typically located near the top of the engine, on the cylinder head of bank 2.
Q: Can I drive my car with a P0393 code?
A: It's not recommended to drive for long with this code, as it can lead to engine performance issues.
Q: How can I reset the P0393 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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Universal · Digital multimeter
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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.