Throttle Actuator "B" Control Motor Circuit High
This code means the PCM/ECM has detected a high-voltage circuit condition affecting throttle actuator "b" control motor. Because airflow is used to calculate fueling, the engine may idle poorly, hesitate, or run with incorrect fuel trims until the fault is repaired.
What You Might Notice
- Check Engine Light illuminated
- Rough idle
- Hesitation on acceleration
- Reduced fuel economy
- Possible stalling
Most Common Causes
- 1
Short to voltage or an internally failed component
- 2
Faulty throttle, MAF/MAP, or related airflow sensor
- 3
Damaged wiring or poor connector contact
- 4
Carbon buildup or sticking throttle body
- 5
PCM/ECM fault
How to Diagnose It
- 1
Check Short to voltage or an internally failed component — Inspect for signs of failure and test before replacing.
- 2
Check Faulty throttle, MAF/MAP, or related airflow sensor — Inspect for signs of failure and test before replacing.
- 3
Check Damaged wiring or poor connector contact — Inspect for signs of failure and test before replacing.
- 4
Check Carbon buildup or sticking throttle body — Inspect for signs of failure and test before replacing.
- 5
Check PCM/ECM fault — Inspect for signs of failure and test before replacing.
How to Fix It
- 1
Inspect the intake tract for leaks or restrictions
- 2
Clean and test the throttle body or airflow sensor
- 3
Repair wiring or connector issues
- 4
Replace the faulty sensor or actuator if testing confirms failure
- 5
Clear the code and verify normal idle and throttle response
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