Table 22
Troubleshooting Test Steps
Values Results
1. Check if NOx Sensors are Installed
A. Locate the appropriate NOx Sensor.
B. Check if the sensor is installed correctly.
Correctly In-
stalled / Not in-
stalled correctly
Result: The sensor is not installed correctly.
Repair: Install the sensor correctly.
Proceed to Test Step 3.
Result: The sensor is installed correctly.
Proceed to Test Step 2.
2. Check for an Exhaust Leak Between the Turbocharger and
the Tailpipe
A. Check for disconnected exhaust pipes.
B. Check for broken/loose joints.
Leak found Result: An exhaust leak is found between the turbo and
the tail pipe.
Repair: Repair the exhaust leak.
Proceed to Test Step 3.
3. Perform the Aftertreatment System Functional Test
A. Reset all active codes and clear all logged codes.
B. Use the electronic service tool to perform the “Aftertreatment
System Functional Test” to verify that the fault is eliminated.
Test passed
Result: The “Aftertreatment System Functional Test”
passed.
The NOx sensing system is fully functional and the fault
has been eliminated.
Return the unit to service.
Result: The “Aftertreatment System Functional Test” did
not pass and the diagnostic code is still present.
Repair: Ensure that the latest engine software is in-
stalled. Refer to Troubleshooting, for the correct
procedure.
Replace the sensor.
If the fault is still present, contact the Dealer Solutions
Network (DSN).
i07704970
Coolant Contains Oil
Probable Causes
• Engine oil cooler
• Cylinder head gasket
• Cylinder head
• Cylinder block
Recommended Actions
Complete the procedure in the order in which the
steps are listed.
82 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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