Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Ignition ON
Observe the DTC information with a scan tool. Verify no other DTCs are set.
- If a DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
- If a DTC is not set .
Verify the scan tool MAF Sensor parameter is between 5 and 40 g/s.
- If less than 5 g/s
  Check for intake system leaks.
  
  If no intake system leaks are found, perform a Diesel Particulate Filter (DPF) Service Regeneration .
- If greater than 40 g/s
  Check for intake system leaks.
- If between 5 and 40 g/s
Verify there are no exhaust system leaks. Refer to Exhaust Leakage .
- If exhaust system leaks were found
  Repair as necessary.
- If no exhaust system leaks were found
Engine idling at operating temperature and in drive.
NOTE: A/C must be in the off position
Verify using the scan tool that the Base Fuel Injector Rate parameter is between 5 mm³ and 16 mm³ .
- If not between 5 mm ³ and 16 mm ³
  Refer to Fuel Injector Balance Test with GDS 2
- If between 5 mm ³ and 16 mm ³
Replace the B52A Heated Oxygen Sensor 1.