Engine-Codes - Generic - C1181

C1181 Code - ABS Active Booster Response

- Code Popularity: 6,391 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC C1181?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Active Booster (Power Brake Booster)
  • Faulty ABS Control Unit/Actuator
  • ABS Control Unit/Actuator harness is open or shorted
  • ABS Control Unit/Actuator circuit poor electrical connection
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How to Fix the DTC C1181?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the C1181 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the C1181 Code Mean?

The Active Brake Booster consists of a vacuum booster, an active booster control group, and a delta stroke sensor. If a brake booster system malfunction occurs due to loss of vacuum, the delta stroke sensor will signal the ABS actuator and electric unit (control unit) that a booster malfunction has occurred. The active booster then applies supplemental force to the master cylinder relative to the amount of force exerted on the brake pedal. The Diagnostic Trouble Code (DTC) will be set when the Active Booster response is malfunctioning, or the signal line of the active booster response is open or shorted.

C1181 Code - ABS Active Booster Response

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