COOLER GP-EXHAUST (NRS) 3926030 - Caterpillar

This diagnostic code is applicable to C6.6 engines only.The electronic unit injector is no longer capable of delivering the correct amount of fuel.System Response:A warning will appear on the display on the control panel. The Electronic Control Module (ECM) will log the diagnostic code.Note: The diagnostic code can be viewed on the electronic service tool.Possible Performance Effect:The engine will be derated.Troubleshooting:Use the electronic service tool to perform the Fuel System Verification Test. If the diagnostic code is still active, do the following procedure.Replace the suspect electronic unit injector. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove" and Disassembly and Assembly, "Electronic Unit Injector - Install".Use the electronic service tool to perform the Fuel System Verification Test.Test Step 1. Perform the following diagnostic procedure: "None"Results:
OK - STOP