Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that helps the engine know the position of a part called the camshaft. This sensor is not working right for one side of the engine.
The camshaft position sensor monitors the position of the camshaft and sends this information to the engine control module (ECM). A faulty reading can affect engine timing and performance.
The P13D9 code indicates that the ECM has detected an issue with the camshaft position sensor 'B' on Bank 2. This sensor is responsible for monitoring the camshaft's position to ensure proper engine timing. A faulty phase position can lead to incorrect timing adjustments.
• Check Engine Light is on
• Poor engine performance
• Engine misfires
• Faulty camshaft position sensor
• Wiring issues or poor connections
• Faulty ECM
Camshaft: A shaft in the engine that controls the opening and closing of the engine's valves.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the camshaft position sensor for proper operation.
• Replace the faulty camshaft position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• BMW 3 Series
• Audi A4
• Mercedes-Benz C-Class
• Regular maintenance checks
• Ensure proper engine oil levels
• Inspect wiring and connectors periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you're unsure.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on engine sensors.
This code has been associated with sensor failures in vehicles with higher mileage.
Moderate – It 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 a safe, stationary position
The camshaft position sensor is located near the camshaft, typically on the top of the engine.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and increased emissions.
Q: Can I drive with this code?
A: It's possible to drive, but it's not recommended as it can cause further damage.
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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.