Conditions for Setting the DTC

C025E 01

• A short to voltage is detected on the signal circuit.
• A short to voltage is detected on the 5V reference circuit.
• A short to voltage is detected on the relay control circuit.

C025E 04

• A open/high resistance is detected on the vacuum sensor signal circuit.
• A open/high resistance is detected on the relay control circuit.

C025E 5A 

The Electronic Brake Control Module detected an erratic Vacuum Sensor Signal that is not plausible.

C025E 71 

The electronic brake control module receives an invalid serial data message from the engine control module.

C027B 02 

A short to ground is detected on the relay control circuit.

C027B 05 

An open or short to voltage is detected on the relay control circuit.