P18E6 – BMW DTC

BMW DTC P18E6 – Transmission Range Sensor Power Supply Circuit High

DTC P18E6 meaning on BMW

The DTC P18E6 code on a BMW indicates a fault in the transmission range sensor power supply circuit. This sensor is responsible for detecting the position of the gear selector and informing the vehicle’s computer system. The power supply circuit high fault suggests that there is an issue with the voltage being supplied to the transmission range sensor.

BMW DTC P18E6 symptoms

Some common symptoms associated with the DTC P18E6 code on a BMW may include:

• Erratic shifting behavior
• Transmission not shifting correctly
• Vehicle going into limp mode
• Illumination of the transmission warning light on the dashboard

BMW DTC P18E6 causes

There are several potential causes for the DTC P18E6 code to appear on a BMW:

• Faulty transmission range sensor
• Issues with the wiring or connectors in the transmission range sensor circuit
• Low voltage supply to the transmission range sensor
• Faulty powertrain control module (PCM)

BMW DTC P18E6 seriousness

The DTC P18E6 code should be addressed promptly as it can lead to drivability issues and potential transmission damage if left unresolved. Ignoring this fault may result in further damage to the transmission system and could compromise the safety and performance of the vehicle.

How to diagnose DTC P18E6 on BMW

Diagnosing the DTC P18E6 code on a BMW involves the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer system.
2. Inspect the wiring and connectors in the transmission range sensor circuit for any signs of damage or corrosion.
3. Test the voltage supply to the transmission range sensor to ensure it is within the specified range.
4. Check the transmission range sensor for proper operation and replace if necessary.

How to fix DTC P18E6 on BMW

To fix the DTC P18E6 code on a BMW, follow these steps:

1. Repair any damaged wiring or connectors in the transmission range sensor circuit.
2. Ensure the voltage supply to the transmission range sensor is correct and address any issues with low voltage.
3. Replace the transmission range sensor if it is found to be faulty.
4. If the powertrain control module (PCM) is determined to be the cause, it may need to be reprogrammed or replaced.

How to erase DTC P18E6 on BMW

After fixing the underlying issue causing the DTC P18E6 code on a BMW, you can erase the code using a diagnostic scanner. Follow these steps:

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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