OBD Guide
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C1188

Brake Fluid Level Sensor Input Short Circuit To Battery

C1188 is an OBD-II diagnostic trouble code meaning: Brake Fluid Level Sensor Input Short Circuit To Battery. Common causes: damage to the sensor wiring harness, short circuit in brake fluid level sensor. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Brake warning light is on
  • Incorrect brake fluid level readings on the dashboard
  • Errors in the ABS/ESP system

Causes

  • Damage to the sensor wiring harness
  • Short circuit in brake fluid level sensor
  • Problems with the ABS/ESP control unit
  • Sensor contact corrosion

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Measure the resistance of the brake fluid level sensor
  3. Check the voltage in the sensor circuit
  4. If necessary, replace the sensor or repair the wiring harness

Related codes

C1189C1190C1191

FAQ

What does the C1188 code mean?

C1188 is an OBD-II diagnostic trouble code that indicates: Brake Fluid Level Sensor Input Short Circuit To Battery

What causes a C1188 error code?

The most common causes of C1188 include: Damage to the sensor wiring harness; Short circuit in brake fluid level sensor; Problems with the ABS/ESP control unit; Sensor contact corrosion.

How do I fix a C1188 diagnostic trouble code?

To fix C1188: Check the integrity of the sensor wiring harness. Measure the resistance of the brake fluid level sensor. Check the voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1188?

Limited driving only, diagnose soon

How much does it cost to fix C1188?

The estimated repair cost for C1188 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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