Home Tips & Tricks 2001 Chevrolet Silverado 1500 service engine soon light is on with trouble...

2001 Chevrolet Silverado 1500 service engine soon light is on with trouble code P1416

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Download Customer Concern: Tests/Procedures: Potential Causes: Diagnostic Codes: The service engine soon light is on with trouble code P1416 present. 1. Use a scanner and command the air pump on with the engine running at idle. Check if the O2 sensors go lean. 2. If the O2 sensor does not go lean on one bank, see if the check valve at the exhaust manifold is stuck closed, not allowing air into the manifold. Defective Check Valve P1416 Confirmed Fix Summary Confirmed Fix 18 – Air Injection Reaction (AIR) Check Valve 1 – Air Injection Reaction (AIR) Check Valve, Air Injection Reaction (AIR) Pump