C1102 OBD-II Trouble Code: ABS Acceleration Switch Circuit Failure

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Cost of diagnosing the C1102 code

C1102 is a diagnostic trouble code (DTC) for "ABS Acceleration Switch Circuit Failure". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
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Toyota $114.99 $20.0
BMW $124.99 $20.0
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C1102 code definition

A C1102 trouble code indicates that the vehicle's Engine Control Unit (ECU) has detected an unspecified failure in the acceleration switch circuit of the Antilock Braking System (ABS).

What the C1102 code means

The antilock braking system is a feature in modern cars, designed to minimize wheel slippage and improve traction. The acceleration switch regulates the ABS settings relative to the performance of the engine. If the acceleration switch has suffered an unspecified failure, this will potentially disable the feature, although regular car brakes should continue to function normally.

What causes the C1102 code?

If your vehicle is suffering from a C1102 code, the issue may lie with a faulty ABS sensor. Corroded, damaged, faulty and otherwise poorly installed circuitry may be to blame for this circuit failure. In some rare cases, the ECU itself may be faulty, mistakenly reporting the trouble code as a result. Because ECUs seldom report trouble codes falsely, it should only be considered as a possibility once the more plausible concerns have been exhausted.

What are the symptoms of the C1102 code?

If the acceleration switch circuit has failed, the ABS will be unable to function properly. Depending on the severity of the issue, it may be completely disabled. Traction may be stiff while the vehicle accelerates or decelerates quickly. Regular, unaided braking should continue to function normally unless more brake-related codes are present. In addition to the practical concerns of an acceleration switch failure. Moreover, the C1102 code will be accompanied by an illuminated check engine light on the vehicle's dashboard, as well as a stored trouble code in the ECU that can be read using an OBD-II scanner. These symptoms are present in a purely diagnostic context, and may be disregarded once the specific issue has been identified.

How does a mechanic diagnose the C1102 code?

The C1102 code is first diagnosed by reading the code using an OBD-II scanner on the vehicle's ECU. ABS sensors (as well as other ABS-related components) should be checked for potential faultiness. Any electrical wiring and connectors should looked over for signs of disconnection, corrosion improper wiring/installation, damage and faultiness. Other diagnostic scanners such as the Autohex can be used to locate the source of the circuit issue.

Common mistakes when diagnosing the C1102 code

Chassis (or C-class) trouble codes may describe different issues depending on the make and model of vehicle in question. Your OBD-II scanner may specify the code description for you. Refer to the user manual if you're uncertain about something, and don't hesitate to reach out to a YourMechanic representative if you need assistance.

How serious is the C1102 code?

A C1102 code will likely disable the antilock braking system; it is strongly recommended against driving a vehicle without this feature working properly. Although it technically won't limit the function of the vehicle, it will handle differently without ABS traction, thereby significantly increasing the risk of accidents. A C1102 trouble code is considerably more serious if the vehicle is typically driven on less-than-optimal driving conditions and routes.

What repairs can fix the C1102 code?

If the acceleration switch is damaged or faulty, it should be replaced. Any electrical wiring and connectors that have been identified as broken, damaged or faulty should be replaced, repaired or rewired accordingly. In the rare event that the ECU has been identified as faulty, it will need to be reprogrammed or replaced altogether. Once you've made any necessary repairs to fix the ABS acceleration switch circuit, restart the vehicle. If the C1102 hasn't been properly solved yet, this will give the trouble code a chance to recur. In the event that the issue hasn't been solved, return to the diagnostic stage and see if there is anything you may have missed.

Additional comments for consideration regarding the C1102 code

The antilock braking system is present on the overwhelming majority of newer car models.

Need help with a C1102 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

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