Possible causes
– Faulty Glow Plug Control Module (GPCM)
– Glow Plug Control Module harness is open or shorted
– Glow Plug Control Module circuit poor electrical connection
– Glow Plug Control Module harness is open or shorted
– Glow Plug Control Module circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1135 DODGE Description
The Engine Control Module (ECM) has detected a voltage supply concern to the Glow Plug Control Module (GPCM)