P1A74 – BMW DTC

BMW DTC P1A74 – Electric/Auxiliary Transmission Fluid Pump Voltage Sensor Circuit Low

DTC P1A74 meaning on BMW

The DTC P1A74 fault code on BMW vehicles indicates an issue with the Electric/Auxiliary Transmission Fluid Pump Voltage Sensor Circuit registering a low voltage signal. This sensor is responsible for monitoring the voltage levels in the transmission fluid pump system.

BMW DTC P1A74 symptoms

Symptoms associated with the BMW DTC P1A74 code may include:

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

BMW DTC P1A74 causes

Common causes of the BMW DTC P1A74 fault code include:

• Malfunctioning Electric/Auxiliary Transmission Fluid Pump Voltage Sensor
• Wiring or connection issues in the sensor circuit
• Low transmission fluid levels

BMW DTC P1A74 seriousness

The seriousness of the BMW DTC P1A74 code lies in the potential transmission-related problems it can cause. Ignoring this fault code may lead to further damage to the transmission system and affect the overall drivability of the vehicle.

How to diagnose DTC P1A74 on BMW

To diagnose the DTC P1A74 code on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
2. Inspect the Electric/Auxiliary Transmission Fluid Pump Voltage Sensor and its wiring for any visible damage or corrosion
3. Check the transmission fluid level and condition
4. Test the sensor’s voltage output using a multimeter

How to fix DTC P1A74 on BMW

Fixing the BMW DTC P1A74 fault code may involve the following steps:

1. Replace the faulty Electric/Auxiliary Transmission Fluid Pump Voltage Sensor
2. Repair any damaged wiring or connections in the sensor circuit
3. Ensure the transmission fluid is at the correct level and in good condition
4. Clear the fault codes and perform a test drive to verify the repair

How to erase DTC P1A74 on BMW

To erase the DTC P1A74 fault code on a BMW, you can use a diagnostic scanner to clear the code from the vehicle’s computer. After fixing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and ensure the repair was successful.

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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