B12C2 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B12C2 – Puddle Lamp Circuit Short To Ground

 

B12C2 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B12C2 Possible Causes

 

Blown High Mounted Stop Lamp Fuse,Faulty High Mounted Stop Lamp,High Mounted Stop Lamp harness is open or shorted,High Mounted Stop Lamp circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B12C2 Description

 

The cargo lamp illuminates when the courtesy lamps illuminate. The Body Control Module (BCM) uses a separate output circuit that supplies voltage to the cargo lamp. The cargo lamp shares the ground circuit with the High Mounted Stop Lamp. The puddle lamps (if equipped) share the voltage supply with the cargo lamp. This Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground from the cargo lamp output circuit.