BMW DTC P1846 – Torque Converter Clutch Circuit Low
DTC P1846 meaning on BMW
DTC P1846 on a BMW indicates a fault in the Torque Converter Clutch (TCC) circuit. This fault is specifically related to a low voltage condition detected in the TCC circuit.
BMW DTC P1846 symptoms
Symptoms of DTC P1846 on a BMW may include:
- Check Engine Light illuminated
- Transmission slipping or shuddering
- Poor fuel economy
- Harsh shifting
BMW DTC P1846 causes
Common causes of DTC P1846 on a BMW include:
- Faulty Torque Converter Clutch Solenoid
- Wiring issues in the TCC circuit
- Low transmission fluid level
- Internal transmission problems
BMW DTC P1846 seriousness
DTC P1846 should be addressed promptly as it can lead to drivability issues and potential damage to the transmission if left unresolved.
How to diagnose DTC P1846 on BMW
To diagnose DTC P1846 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the TCC solenoid and wiring for any visible damage
- Check the transmission fluid level and condition
- Perform a test drive to observe the transmission behavior
How to fix DTC P1846 on BMW
To fix DTC P1846 on a BMW, the following steps may be taken:
- Replace the faulty Torque Converter Clutch Solenoid
- Repair any damaged wiring in the TCC circuit
- Ensure the transmission fluid level is correct and top up if necessary
- If internal transmission issues are found, further diagnosis and repair may be required
How to erase DTC P1846 on BMW
After fixing the underlying issue causing DTC P1846 on a BMW, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and erase the DTC from the vehicle’s memory.
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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