[taloninmi]

About a year ago I replaced the headlights. I also replaced the taillights. Fast forward to today, I was on a 2-3 hour drive downstate and the brake light on the dash came on, then the traction control light came on. It came up on my code reader later today as c0021 and c1252. I’ve been having issues with the right headlight going out so I was wondering if it was a ground. Anyone have any ideas?

 

[Old Dogger]

Welcome to the Forum!

The technician may find DTC C0021 (Brake Booster Performance) set in EBCM. Replace the Brake Master Cylinder Pressure Sensor (3) with new updated part number.
What are the Possible Causes of the Code C0021?

• Faulty Brake Booster
• Faulty Vacuum Pressure Sensor
• Vacuum Pressure Sensor harness is open or shorted
• Vacuum Pressure Sensor circuit poor electrical connection

What are the Possible Causes of the Code C1252?

• Faulty Electronic Brake Control module (EBCM)
• Electronic Brake Control module (EBCM) harness is open or shorted
• Electronic Brake Control module (EBCM) circuit poor electrical connection

^^^ I hope that the above helps........

 

[taloninmi]

Could a ground possibly be the cause?