P1A70 – BMW DTC

BMW DTC P1A70 – Electric/Auxiliary Transmission Fluid Pump Current Sensor Circuit Low

DTC P1A70 meaning on BMW

The DTC P1A70 fault code on BMW vehicles indicates an issue with the Electric/Auxiliary Transmission Fluid Pump Current Sensor Circuit being detected as low. This fault code is specific to the electric or auxiliary transmission fluid pump current sensor circuit.

BMW DTC P1A70 symptoms

Symptoms of the BMW DTC P1A70 code may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Transmission shifting issues
• Reduced performance or drivability

BMW DTC P1A70 causes

Common causes of the BMW DTC P1A70 fault code include:

• Malfunctioning electric or auxiliary transmission fluid pump
• Wiring or connector issues in the current sensor circuit
• Defective current sensor

BMW DTC P1A70 seriousness

The DTC P1A70 fault code should not be ignored as it can lead to transmission performance issues and potential drivability concerns. It is recommended to address this fault code promptly to prevent further damage to the transmission system.

How to diagnose DTC P1A70 on BMW

To diagnose the DTC P1A70 fault code on a BMW, you can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes and freeze frame data
2. Inspect the wiring and connectors in the electric transmission fluid pump current sensor circuit for any damage or corrosion
3. Test the electric or auxiliary transmission fluid pump and current sensor for proper operation

How to fix DTC P1A70 on BMW

To fix the DTC P1A70 fault code on a BMW, you may need to:

1. Repair or replace any damaged wiring or connectors in the current sensor circuit
2. Replace the electric or auxiliary transmission fluid pump if it is found to be faulty
3. Replace the current sensor if it is determined to be defective

How to erase DTC P1A70 on BMW

To erase the DTC P1A70 fault code on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes from the vehicle’s memory
2. After fixing the underlying issue, ensure that the repair is successful by driving the vehicle and rescanning for any remaining fault codes

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.