Throttle Actuator "B" Control Motor Circuit Low
This code means the PCM/ECM has detected a low-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 ground or excessive resistance in the circuit
- 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 ground or excessive resistance in the circuit — 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
- 5
Clear the code and verify normal idle and throttle response
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