Error code C1112 is displayed and the check engine light is on - what does this mean?
The DTC C1112 is recognized by the OBD/EOBD system and indicates a problem with the ABS sensor or the brake pressure sensor. This error code mainly affects the anti-lock braking system (ABS) and can have different specific meanings for different manufacturers.
What causes can this error code have?
- Defective ABS wheel speed sensor
- Damaged wiring to the ABS sensor
- Corroded or loose plug connections
- Dirty or damaged sensor ring
- Defective ABS control unit
- Interrupted ground connection
- Mechanical damage to the wheel bearing
- Incorrect installation of the sensor
What symptoms occur in parallel with fault code C1112?
- ABS warning light: The ABS indicator light in the dashboard lights up continuously
- Locking wheels: The affected wheel locks when braking
- Uneven braking behavior: The vehicle pulls to one side when braking
- Deactivated ABS: The anti-lock braking system no longer functions properly
- ESP malfunction: The electronic stability program may also be affected
- Traction control: The traction control may not be working correctly
How can the problem of trouble code C1112 be resolved?
- There are various solutions available for rectifying trouble code C1112:
- Carry out sensor cleaning: Remove the affected ABS sensor, clean it thoroughly and check for damage, then refit it with the correct torque
- Check the wiring completely: Check all cables to the ABS sensor for breaks, chafing or corrosion and replace damaged cables
- Repair plug connections: Disconnect all connectors on the ABS system, clean with contact spray and reconnect firmly
- Replace the sensor ring: Check the pulse ring on the wheel bearing for damage or dirt and replace if necessary
- Replace the ABS sensor completely: In the event of irreparable damage, replace the entire wheel speed sensor with an original part
- Control unit diagnostics: Check the ABS control unit using professional diagnostic technology and reprogram or replace if necessary
FAQ - Frequently asked questions about DTC C1112
Can I continue driving with error code C1112?
It is generally possible to continue driving, but the ABS will not function properly. The wheels may lock during emergency braking, which increases the risk of an accident. A prompt repair is strongly recommended.
How much does it cost to repair error code C1112?
The repair costs vary depending on the cause: a sensor cleaning costs around 50-80 euros, a new ABS sensor between 80-200 euros, wiring repairs 100-300 euros. Control unit defects can cost between 500-1200 euros.
Can the code C1112 be remedied by self-repair?
Simple work such as sensor cleaning or connector checks are possible for experienced hobby mechanics. However, more complex repairs to the ABS system should be carried out by a specialist workshop, as safety systems are affected.
How often does error code C1112 occur?
DTC C1112 is one of the more common ABS error codes, especially in vehicles with higher mileage. Contamination and ageing of the sensors are the main causes of this code occurring.
Can bad weather trigger code C1112?
Yes, extreme weather conditions can trigger the fault code. Road salt in winter in particular leads to corrosion on sensors and wiring, while mud and dirt can contaminate the sensor rings.
Does fault code C1112 disappear by itself?
In rare cases, the code can disappear after short-term faults (e.g. loose plug). In most cases, however, there is a permanent fault that requires a specific repair. Deleting the code without rectifying the cause will cause it to reappear.
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