P2553 Possible Causes
- Faulty Fuel Injector Control Module (FICM)
- Faulty Powertrain Control Module (PCM)
- Open or short circuit in Fuel Injector Control Module wiring harness
- Poor electrical connection in Fuel Injector Control Module circuit
How to Fix Code P2553
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P2553 Meaning
The DEPM (Diesel Engine Power Monitor) strategy resides in the Transmission Control Module (TCM) located inside the Powertrain Control Module (PCM). The function of DEPM is to monitor engine RPM when there is no power demand from the Accelerator Pedal Position (APP) sensor.
During normal engine idle operation, the DEPM RPM value should always be higher than the engine RPM. In cases where engine RPM does not exceed the DEPM limit, DEPM disables the crankshaft and camshaft output signal sent from the PCM to the Fuel Injector Control Module (FICM).