SES Light On Or Oil Found In Air Intake - keywords absorber board card consumption crankcase duct hesitate leak level low mode pad patch PCV reducedpwrmde reduced power SES snorkel service

This PI was superseded to update model years and Recommendation/Instructions. Please discard PIP3786.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

A dealer technician may find trouble codes P0101, P0172, P0175, oil in the air cleaner, or a loose hydrocarbon patch in the air intake snorkel.

If the dealer has found the P0101, P0172, P0175, oil in the air cleaner, or a loose hydrocarbon patch in the air intake snorkel, complete the diagnostic suggestions below.

1. Please see bulletin number 05-06-01-032, and follow the owner's manual for proper engine oil filling procedures.
2. Inspect the foul air PCV tube for restrictions or obstructions. The foul PCV tube is a short formed rubber hose that is located between the fitting on the valley cover and the fitting on the plenum side of the throttle body.
3. Inspect the fitting on the engine block valley cover, there is a 2.5 m/m orifice in the valley cover fitting, and it should be clean and clear of obstructions.
4. Inspect the semi-fresh air PCV tube for restrictions or obstructions. The semi-fresh PCV tube is located between the rocker covers and the rear fitting of the oil tank.
5. Inspect the fresh air PCV tube for restrictions or obstructions. The fresh PCV tube is the located between the fitting on the clean air duct (atmospheric side of the throttle body after the mass airflow sensor) and the front fitting of the oil tank.

Note: Make sure the semi-fresh and fresh pcv tubes are installed correctly on the oil tank. The fresh PCV tube is attached to the front port of the oil tank, and the semi-fresh tube is attached to the rear port of the oil tank.

Improper oil levels or PCV restrictions could cause excess oil to be forced into the engine air intake snorkel. If this occurs, it can contaminate the adhesive that attaches the hydrocarbon patch to the snorkel. This may cause the patch to become detached and restrict air flow.

Clean any excessive oil from the air intake and replace the air intake snorkel if necessary.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.