Circuit/System Testing

Verify none of the conditions listed below exist:

P2096 or P2098

• Air intake duct collapsed or restricted.
• Air filter dirty or restricted.
• Contamination of the mass air flow sensor with oil or other foreign material
• Objects blocking the throttle body.
• Excessive fuel in the crankcase. Change engine oil as necessary.
• Rich fuel injectors. Refer to Fuel Injector Diagnosis .
• Excessive fuel system pressure. Refer to Fuel System Diagnosis .
• Fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
• Fuel saturation of the evaporative emissions (EVAP) canister.
• Stuck open or leaking EVAP purge valve.
• Restricted exhaust. Refer to Symptoms - Engine Exhaust .
• Improper operation of the crankcase ventilation system.

P2097 or P2099

• Exhaust system leaks. Refer to Symptoms - Engine Exhaust .
• Split, kinked or improperly connected vacuum hoses.
• Contamination of the mass air flow sensor with oil or other foreign material
• Insufficient fuel in the tank.
• Leaks in the air induction system and air intake ducts.
• Missing air filter element.
• Cracked evaporative canister.
• Evaporative pipes plugged, obstructed or leaking.
• Crankcase ventilation system leaking.
• Engine vacuum leaks.
• Low fuel system pressure. Refer to Fuel System Diagnosis .
• Contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
• Lean fuel injectors. Refer to Fuel Injector Diagnosis .

• If a condition is found 

Repair as necessary.