P0393 BMW Code - Camshaft Position Sensor 'B' Circuit High Bank 2
Quick Answer
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0393 BMW indicates Camshaft Position Sensor 'B' Circuit High Bank 2.
- Common causes
- Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0393 BMW Description
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
What are the Possible Causes of the DTC P0393 BMW?
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
How to Fix the DTC P0393 BMW?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0393 BMW code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0393 BMW Code
1. What does the OBDII code P0393 mean on a BMW?
P0393 indicates a high voltage condition in the Camshaft Position Sensor 'B' Circuit on Bank 2, meaning the sensor may be malfunctioning or there’s an issue in its wiring.
2. What are the common symptoms of code P0393 in a BMW?
Symptoms can include engine misfires, rough idling, poor acceleration, reduced fuel efficiency, difficulty starting, or the Check Engine Light turning on.
3. What causes the P0393 code to appear in a BMW?
Common causes include a faulty camshaft position sensor, damaged or corroded wiring, loose electrical connections, or issues with the engine control module (ECM).
4. How do I fix the P0393 code on my BMW?
Inspect and repair any damaged wiring or loose connections, replace the Camshaft Position Sensor 'B' if faulty, and clear the code with an OBDII scanner. If the issue persists, consult a mechanic for further diagnosis.
5. Can I drive my BMW with a P0393 code?
While the car may still be drivable, it’s not advisable as it can lead to engine performance issues or further damage. Address the problem promptly to avoid additional repairs.
6. How much does it cost to fix the P0393 code on a BMW?
Repair costs can vary, but replacing a camshaft position sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs or ECM issues may increase costs.
7. How do I know if the camshaft position sensor is faulty?
Signs of a faulty sensor include irregular engine performance, stalling, hard starts, and diagnostic trouble codes like P0393.
8. What tools are needed to diagnose a P0393 code in a BMW?
You’ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly basic hand tools for inspecting and replacing components.
9. Where is the Camshaft Position Sensor 'B' located on a BMW?
Sensor 'B' is typically located on the exhaust camshaft of Bank 2, which is the side of the engine opposite Bank 1. Consult your vehicle’s service manual for exact placement.
10. Can a bad ECM cause the P0393 code in a BMW?
Yes, though it’s less common. A malfunctioning engine control module could misinterpret sensor signals, leading to the P0393 code.
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