Jeep DTC P1389 – No Auto Shutdown (ASD) Relay Output Voltage At PCM
DTC P1389 meaning on Jeep
DTC P1389 for Jeep indicates “No Auto Shutdown (ASD) Relay Output Voltage At PCM.” This means that the Powertrain Control Module (PCM) is not receiving the expected voltage signal from the Auto Shutdown (ASD) relay.
Jeep DTC P1389 symptoms
Symptoms of DTC P1389 on a Jeep may include:
- Engine stalling or not starting
- Check Engine Light (CEL) illuminated on the dashboard
- Loss of power while driving
Jeep DTC P1389 causes
Common causes of DTC P1389 on a Jeep include:
- Defective ASD relay
- Wiring issues or poor connections in the ASD relay circuit
- Faulty PCM
Jeep DTC P1389 seriousness
DTC P1389 is a serious issue as it can lead to engine stalling or failure to start, potentially leaving the vehicle stranded. It is important to address this issue promptly to avoid further complications.
How to diagnose DTC P1389 on Jeep
To diagnose DTC P1389 on a Jeep, you can:
- Check the ASD relay for proper operation
- Inspect the wiring and connections in the ASD relay circuit for any damage or corrosion
- Use a diagnostic scanner to read the fault codes and monitor the ASD relay voltage signal
How to fix DTC P1389 on Jeep
To fix DTC P1389 on a Jeep, you may need to:
- Replace the faulty ASD relay
- Repair any damaged wiring or connections in the ASD relay circuit
- If necessary, replace the PCM if it is determined to be the cause of the issue
How to erase DTC P1389 on Jeep
To erase DTC P1389 on a Jeep, you can:
- Use a diagnostic scanner to clear the fault codes stored in the PCM
- After making the necessary repairs, perform a test drive to ensure the issue has been resolved
Recommended tools for Jeep diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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