BMW DTC P1659 – Cold Start Throttle Actuator Control Range/Performance (Bank 1)
DTC P1659 meaning on BMW
The Diagnostic Trouble Code (DTC) P1659 for BMW refers to the Cold Start Throttle Actuator Control Range/Performance issue in Bank 1. This code indicates that there is a problem with the throttle actuator control system during cold start conditions.
BMW DTC P1659 symptoms
Symptoms of DTC P1659 on a BMW may include:
- Engine stalling or rough idling during cold starts
- Lack of power or hesitation when accelerating
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P1659 causes
The common causes of DTC P1659 on a BMW include:
- Malfunctioning throttle actuator
- Wiring or connector issues in the throttle actuator circuit
- Faulty engine control module (ECM)
BMW DTC P1659 seriousness
The seriousness of DTC P1659 on a BMW depends on the underlying cause. Ignoring this issue can lead to poor engine performance, reduced fuel efficiency, and potential drivability problems. It is recommended to address this code promptly to prevent further damage to the vehicle.
How to diagnose DTC P1659 on BMW
To diagnose DTC P1659 on a BMW, you can follow these steps:
- Use an OBD-II scanner to retrieve the fault codes stored in the vehicle’s ECM.
- Inspect the throttle actuator and its wiring for any visible damage or corrosion.
- Perform a visual inspection of the connectors and wiring related to the throttle actuator system.
- Test the throttle actuator using a multimeter to check for proper voltage and resistance.
How to fix DTC P1659 on BMW
To fix DTC P1659 on a BMW, you can try the following solutions:
- Replace the faulty throttle actuator with a new one.
- Repair or replace any damaged wiring or connectors in the throttle actuator circuit.
- Reset the ECM by disconnecting the battery for a few minutes.
- If the issue persists, seek professional help for further diagnosis and repair.
How to erase DTC P1659 on BMW
To erase DTC P1659 on a BMW, you can:
- Use an OBD-II scanner to clear the fault codes stored in the ECM.
- Alternatively, disconnect the battery for a few minutes to reset the ECM and clear the codes.
- After clearing the codes, monitor the vehicle for any recurring issues.
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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