Test Description
WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The number below refer to the step number on the diagnostic procedure.
- 4
An O2S contaminated by silicone will have a White, powdery deposit on the portion of the O2S that is exposed to the exhaust stream. The usual cause of silica contamination is the use of unapproved silicone RTV engine gasket material or the use of silicone based sprays or fluids within the engine. If the cause of this contamination is not corrected, the replacement O2S will also get contaminated.Perform the DTC P1441 diagnosis to determine if an EVAP purge condition is present. Go to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- 8
When testing the circuits for continuity the resistance should be less than 5 ohms. When testing the circuits for shorts the resistance should measure infinite with all components disconnected from the circuit. - 9
This step determines if a base engine concern is causing the rich condition or if the rich condition is only present when operating on CNG. - 10
An O2S contaminated by silicone will have a White, powdery deposit on the portion of the O2S that is exposed to the exhaust stream. The usual cause of silica contamination is the use of unapproved silicone RTV engine gasket material or the use of silicone based sprays or fluids within the engine. If the cause of this contamination is not corrected, the replacement O2S will also get contaminated.