B051A Possible Causes
- Faulty Left Side Assist Step Motor
- Left Side Assist Step Motor harness is open or shorted
- Left Side Assist Step Motor circuit poor electrical connection
- Faulty Assist Step Control Module (ASC)
How do I fix code B051A
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
B051A Tech NotesB051A 0B Left Side Assist Step Motor Control Circuit Current Above Threshold
B051A 01 Left Side Assist Step Motor Control Circuit Short to Battery
B051A 02 Left Side Assist Step Motor Control Circuit Short to Ground
B051A 04 Left Side Assist Step Motor Control Circuit Open Circuit
Cost of diagnosing the B051A code
Labor: 1.0The cost of diagnosing the B051A code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B051A Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B051A MeaningThe Assist Step Control Module (ASC) controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.
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