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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (6.7L Diesel - DTCS - P1192 To P21C3 - 3500 Cab & Chassis) >> Diagnosis and Testing >> P1C55-NOx SENSOR INTERMITTENT - BANK 1 SENSOR 1 >> Testing >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. OTHER DTCS 
    1. Ignition on, engine not running.
    2. With the scan tool check for active DTCs.

      Are any of the P2202, P2209, P220A, U029D DTCs active?

      Yes 

      • Repair the other active DTCs before continuing with this diagnostic procedure.

      No 

      • Go To  2.
  2. CHECK FOR CYLINDER MISFIRE 
    1. Start the engine.
    2. With the scan tool, navigate to Systems Tests, and perform the injector Kill system test.

      Were any cylinders found to be faulty or low?

      Yes 

      No 

      • Go To  3.
  3. CHECK FOR EXCESSIVE ENGINE OIL BEING INTRODUCED INTO THE AFTERTREATMENT SYSTEM 
    1. Turn the ignition off.
    2. Remove the turbocharger outlet and inspect for signs of oil, fuel or moisture being introduced into the Aftertreatment system from the engine.

      Was engine oil, fuel or moisture found in the turbocharger exhaust outlet?

      Yes 

      • Locate the cause of possible diesel fuel or engine oil being carried from the engine into the exhaust system. Inspect the SCR Catalyst for possible damage.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .

      No 

      • Go To  4.
  4. CHECK THE EGR SYSTEM FOR LEAKS 
    1. Visually inspect the entire EGR system for signs soot indicating a leak.

      Is there signs of an EGR system leak?

      Yes 

      No