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AutoCodes - Generic - C121E

C121E Code - Brake Pressure Sensor Comparative Performance

- Code Popularity: 1,922 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C121E?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Air in Brake System
  • Faulty Brake Switch
  • Brake Switch harness is open or shorted
  • Brake Switch circuit poor electrical connection
  • Faulty Anti-Lock Brake System (ABS) Module
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How to Fix the DTC C121E?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C121E code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to 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)

Code C121E Description

The Anti-Lock Brake System (ABS) Module monitors the Brake Pressure Sensor. The ABS Module sets the OBDII code when the Brake Pressure Sensor is not to factory specifications.

OBDII Code C121E - Brake Pressure Sensor Comparative Performance - AutoCodes.com
C121E Code - Brake Pressure Sensor Comparative Performance

Need More Information on the Code?

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Code C121E comments

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