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 specific signal it needs to start the engine. It's like trying to read a book in the dark.
The engine control module (ECM) is not receiving the expected high-resolution timing signal from the crankshaft or camshaft sensor during engine start.
P139E is triggered when the ECM detects an issue with the high-resolution timing signal 'A' during the engine start process. This signal is crucial for synchronizing the engine's ignition and fuel injection systems. A fault in this signal can lead to starting issues or engine performance problems.
• Engine may not start
• Check Engine Light is on
• Poor engine performance
• Faulty crankshaft or camshaft position sensor
• Damaged or corroded wiring or connectors
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Crankshaft: A shaft driven by the engine's pistons that rotates and provides power.
• Use an OBD-II scanner to confirm the code.
• Inspect the crankshaft and camshaft position sensors for damage.
• Check wiring and connectors for corrosion or damage.
• 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
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular maintenance and inspection of sensors.
• Keep wiring and connectors clean and free of corrosion.
• Address Check Engine Light issues promptly.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you experience starting issues.
Check with your vehicle manufacturer for specific warranty coverage on sensors and ECM.
This code has been associated with sensor failures and wiring issues in various vehicles over the years.
Moderate – It should be addressed soon to avoid potential starting issues.
Ignoring this code may lead to vehicle starting problems and is not recommended for safe operation.
• Engine off and cool
• Battery fully charged
The crankshaft and camshaft position sensors are typically located near the engine's crankshaft and camshaft, respectively.
Q: Can I drive with a P139E code?
A: It's not recommended as it may lead to starting issues or poor engine performance.
Q: How do I clear a P139E code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, it should not return.
High-End · Full-system diagnostics
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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.
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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.