P1659
Electronic Throttle Control System Control Relay OFF Malfunction
Severity
🔴 HighCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)
Symptoms
- Check Engine light comes on
- Reduced engine power
- Unstable engine idling
- Acceleration problems
- The car goes into emergency mode
Causes
- Faulty ETC control relay
- Open or short circuit in the relay circuit
- Poor contact in relay connectors
- Relay power problems
- Engine control unit malfunction
How to Fix
- Check the condition of the ETC relay and replace if necessary.
- Check the integrity and resistance of the relay control circuits
- Check relay supply voltage
- Inspect and clean connector contacts
- If necessary, diagnose the engine control unit