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 having trouble understanding where one of the engine's parts, called the camshaft, is located. It's like when you can't find your toy because it's not where it's supposed to be.
The camshaft position sensor 'B' on bank 1 is not providing the correct signal to the engine control module (ECM), which affects engine timing.
The P1339 code indicates a problem with the camshaft position sensor 'B' on bank 1. This sensor monitors the position of the camshaft and sends this data to the ECM to ensure proper engine timing and performance. A faulty signal can lead to misfires, poor performance, and increased emissions.
• Check engine light on
• Poor engine performance
• Engine misfires
• Faulty camshaft position sensor
• Wiring issues or poor connections
• Timing chain or belt issues
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 connections to the camshaft position sensor
• Test the camshaft position sensor with a multimeter
• Replace the camshaft position sensor
• Repair or replace damaged wiring
• Adjust or replace the timing chain or belt
• OBD-II scanner
• Multimeter
• Socket set
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regular maintenance checks
• Timely replacement of timing components
• Ensure proper sensor installation
Sensor Issue
• Do not ignore the check engine light
• Address the issue promptly to avoid further damage
Check with your vehicle manufacturer for specific warranty coverage related to sensors.
This code has been associated with sensor failures and timing issues in various vehicle models over the years.
Moderate – Should be addressed soon to prevent further engine issues.
Driving with a faulty camshaft position sensor can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in park or neutral
The camshaft position sensor is typically located on the engine block or cylinder head near the camshaft.
Q: Can I drive with a P1339 code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine performance issues.
Q: How can I reset the check engine light?
A: You can use an OBD-II scanner to clear the code, but the underlying issue must be fixed to prevent the light from coming back on.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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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.