BMW DTC P1338 – Camshaft Position Sensor ‘A’ Faulty Phase Position (Bank 1)
DTC P1338 meaning on BMW
The DTC P1338 code on a BMW indicates a fault with the Camshaft Position Sensor ‘A’ in Bank 1. This fault specifically relates to the phase position of the sensor being detected as faulty.
BMW DTC P1338 symptoms
Symptoms of a DTC P1338 on a BMW may include rough idling, engine misfires, poor acceleration, and in some cases, the vehicle may even stall. The Check Engine Light will also be illuminated on the dashboard.
BMW DTC P1338 causes
The most common causes of a DTC P1338 on a BMW are a faulty camshaft position sensor, wiring issues in the sensor circuit, or a problem with the engine control module (ECM).
BMW DTC P1338 seriousness
While a DTC P1338 may not cause immediate harm to the vehicle, it can lead to poor engine performance and potentially more severe issues if left unresolved. It is recommended to address this code promptly to prevent further damage.
How to diagnose DTC P1338 on BMW
To diagnose a DTC P1338 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the camshaft position sensor and its wiring. Testing the sensor’s output signal and checking for any related faults in the system would also be necessary.
How to fix DTC P1338 on BMW
Fixing a DTC P1338 on a BMW usually involves replacing the faulty camshaft position sensor. It is important to ensure that the new sensor is properly installed and that any wiring issues are addressed. Clearing the fault code and performing a test drive to verify the repair is also recommended.
How to erase DTC P1338 on BMW
To erase a DTC P1338 on a BMW, a diagnostic scanner can be used to clear the fault code from the vehicle’s ECM. Once the repair has been completed and the issue resolved, the code can be erased to turn off the Check Engine Light.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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