P1589
Throttle Control Unit Modulated Command Malfunction
P1589 is an OBD-II diagnostic trouble code meaning: Throttle Control Unit Modulated Command Malfunction. Common causes: malfunction of the throttle control unit, problems with wiring or contacts. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- The engine goes into emergency mode
- Reduced engine power
- Unstable operation at idle
- Acceleration problems
Causes
- Malfunction of the throttle control unit
- Problems with wiring or contacts
- Mechanical problems with the throttle valve
- Throttle valve contamination
- Control unit power supply problems
How to Fix
- Check the condition of the throttle valve and clean if necessary
- Check the integrity of wiring and contacts
- Scan the system for additional errors
- Check the operation of the throttle control unit
- If necessary, replace the throttle valve control unit
Related codes
Error P1589 by Vehicle Brand
FAQ
What does the P1589 code mean?
P1589 is an OBD-II diagnostic trouble code that indicates: Throttle Control Unit Modulated Command Malfunction
What causes a P1589 error code?
The most common causes of P1589 include: Malfunction of the throttle control unit; Problems with wiring or contacts; Mechanical problems with the throttle valve; Throttle valve contamination.
How do I fix a P1589 diagnostic trouble code?
To fix P1589: Check the condition of the throttle valve and clean if necessary. Check the integrity of wiring and contacts. Scan the system for additional errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1589?
Limited driving only, diagnose soon
How much does it cost to fix P1589?
The estimated repair cost for P1589 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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