Faulty brake booster motor position sensor or its internal circuitry; Damaged or corroded wiring and connectors between the sensor and control module; Brake booster motor mechanical binding or wear causing the sensor to read out of range; Contaminated or degraded sensor due to moisture or debris intrusion; Control module software glitch or internal fault misinterpreting sensor signals; Low system voltage or poor ground connections affecting sensor operation

DTC codes / C05xx · Brakes, steering and suspension / C058E

C058EBrake Booster Motor B Position Sensor Circuit Range/Performance

C058E indicates that the brake booster motor's position sensor circuit has detected a range or performance error, meaning the signal from the sensor does not match expected values for the booster motor's commanded position. The control module sets this code when the sensor voltage or signal pattern falls outside the valid range or fails to change as the motor moves, which can affect brake assist performance.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Symptoms you may notice

Illumination of the brake system warning light or a generic check engine light
Reduced or inconsistent brake pedal assist, requiring more effort to stop
A brake pedal that feels unusually hard or spongy during application
Audible noises from the brake booster area, such as clicking or whirring
Often no symptoms besides the warning light, especially in early stages

Common causes, most likely first

Faulty brake booster motor position sensor or its internal circuitry
Damaged or corroded wiring and connectors between the sensor and control module
Brake booster motor mechanical binding or wear causing the sensor to read out of range
Contaminated or degraded sensor due to moisture or debris intrusion
Control module software glitch or internal fault misinterpreting sensor signals
Low system voltage or poor ground connections affecting sensor operation

How to diagnose and fix it

Verify the code with a scan tool and check for any related stored codes in the brake control module
Inspect the brake booster motor position sensor connector and wiring for damage, corrosion, or loose pins
Measure the sensor reference voltage and ground at the connector to confirm proper power and ground
Perform a live data check of the position sensor signal while moving the booster motor through its range to spot erratic readings
Check the brake booster motor for mechanical binding or abnormal resistance that could skew sensor performance
If the sensor signal is out of specification, replace the brake booster motor position sensor and clear the code
After repair, clear codes and perform a road test to confirm the code does not return and brake assist functions correctly

Before you replace the booster motor

A common oversight is assuming the position sensor itself is faulty when the real problem is a chafed wire harness near the booster, which can intermittently short and set the code.
The code can be set by a weak battery or charging system issue, so always check battery voltage and ground integrity before condemning the sensor.
Some vehicles require a relearn or calibration procedure after sensor replacement, and skipping it will cause the code to reset immediately.
The brake booster motor position sensor often shares a circuit with other sensors, so a fault in a related component can trigger C058E as a secondary code.
Do not overlook the possibility of a software update for the brake control module, as manufacturers sometimes release calibrations to correct false sensor range errors.

Can I keep driving with C058E?

If the brake pedal feels normal and the warning light is the only symptom, you can drive cautiously to a repair shop, but avoid heavy braking or towing. If brake assist is noticeably reduced or the pedal is hard, stop driving and have the vehicle towed to prevent a safety risk.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.