Repair Verification

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Engine running, observe the scan tool MAP and BARO parameters. The MAP and BARO sensor parameters should be within 5 kPa of each other.
Engine running, command the turbocharger Vane Pos. Ctrl. Solenoid valve ON. With a scan tool, slowly increase the engine speed from idle to 2,000 RPM and then return the engine to idle speed. The MAP sensor parameter should increment to a higher value and then return to a near BARO value at idle.

NOTE: Refer to Diesel Particulate Filter (DPF) Regeneration Enable Notice .

Certain engine control conditions can cause the exhaust particulate filter (EPF) to overload with soot. It will necessary to clean the EPF as instructed to remove the excess soot accumulation. To avoid the customer's return to the service department, perform the Exhaust Particulate Cleaning procedure.