P2262

P2262-TURBOCHARGER BOOST PRESSURE NOT DETECTED - MECHANICAL

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Variable Geometry Turbocharger (VGT) is electronically activated by the Powertrain Turbo Actuator. The Turbo Actuator is a smart device and receives information via the J1939 BUS from the Powertrain Control Module (PCM). The Turbo Actuator performs its own diagnostics and reports failures back to the PCM using the J1939 BUS. The PCM then decodes the error message and converts it to a fault code. The PCM lights the MIL lamp immediately after the diagnostic runs and fails. The PCM will turn off the MIL lamp immediately after this diagnostic runs and passes in four consecutive drive cycles.

- When Monitored:
Continuously with ignition on.

- Set Condition:
The commanded position and the actual position do not match over a calibrated time.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. INTERMITTENT CONNECTION

NOTE: The Turbocharger Cleaning procedure can only run if the P2262, P226B or P2563 are present (active, pending or stored). Do not erase the DTC before attempting to run the procedure.

1. Turn ignition off.
2. Disconnect the Turbo Actuator harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Is there any damage done to the connector or pins?

Yes

- Repair/replace harness.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 2

2. TURBOCHARGER CLEANING
1. Turn ignition on.
2. With the scan tool, initialize the VG Turbocharger Cleaning Procedure.

NOTE: After the procedure is initialized you will see one of three messages on the screen.

Which message displayed on the tool?

Turbo does not need to be cleaned;

- The Turbocharger does not need cleaning. If DTC P2262, P226B or P2563 are active or pending, replace the Turbocharger. If the DTC is stored, erase the DTC. Test drive the vehicle and verify the DTC does not return.

The engine must idle at 1,500 RPMS for 5 minutes prior to injecting the cleaner;

- Cleaning procedure has started. Follow the instructions on the screen completely. When the procedure is completed the scan tool will display the results.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

VG Turbocharger cleaning was unsuccessful;

- Cleaning the Turbocharger will not correct the problem. Replace the Turbocharger assembly.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.