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 getting a signal from a sensor that tells it how fast the engine is spinning, but the signal is too high. It's like the sensor is shouting instead of speaking normally.
The P0338 code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the crankshaft position sensor A circuit.
The crankshaft position sensor monitors the position or rotational speed of the crankshaft. The ECM uses this data to control ignition timing and fuel injection. A 'high' circuit condition indicates that the voltage reading from the sensor is above the expected range.
• Engine may not start
• Engine stalls or misfires
• Check Engine Light is on
• Faulty crankshaft position sensor
• Damaged or corroded wiring/connectors
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to verify the code
• Inspect the crankshaft position sensor and its wiring for damage
• Test the sensor's voltage and resistance
• Replace the crankshaft position sensor
• Repair or replace damaged wiring/connectors
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Socket set
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain engine sensors
• Keep wiring and connectors clean and dry
• Use high-quality replacement parts
Sensor Issue
• Do not ignore the Check Engine Light
• Consult a professional mechanic if unsure
• Regular maintenance can prevent sensor issues
Sensor-related repairs may be covered under powertrain warranty if the vehicle is still under warranty.
P0338 is a common code that can occur in various makes and models, often due to sensor wear or electrical issues.
Moderate – It should be addressed soon to prevent potential engine performance issues.
Driving with a malfunctioning crankshaft position sensor can lead to stalling or starting issues, which can be dangerous.
• Engine running
• Vehicle at operating temperature
The crankshaft position sensor is usually located near the bottom of the engine, close to the crankshaft pulley.
Q: Can I drive with a P0338 code?
A: It's not recommended as it can lead to engine stalling or starting issues.
Q: How do I clear a P0338 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
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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.