Circuit/System Verification

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Disregard any transmission symptoms, antilock brake system (ABS) indicators, and traction control system (TCS) indicators until any fuel trim faults are repaired. A fuel trim fault may cause default actions such as harsh shifts and illumination of the ABS/TCS indicators.

Verify that other DTCs are not set.
- If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Allow the engine to reach operating temperature. With the engine running, observe the HO2S 1 parameter with a scan tool. The HO2S 1 value should vary from approximately 40 mV to approximately 900 mV, and respond to fueling changes.
- If the value does not vary from approximately 40 mV to approximately 900 mV, refer to DTC P0030, P0036, P0053, P0054, P0135, or P0141 , DTC P0050, P0056, P0059, P0060, P0155, or P0161 , DTC P0131, P0132, P0137, or P0138 , DTC P0133, P0134, P013A, P013B, P013E, P013F, P0140, P1133, P2270, P2271, or P2A00 , DTC P0151, P0152, P0157, or P0158 , or DTC P013C, P013D, P014A, P014B, P0153, P0154, P0160, P1153, P2272, P2273, or P2A03 .

NOTE: The EVAP purge enablement may cause the FT to be momentarily outside the normal range.

The normal Short Term FT parameter should be between +10 percent and -10 percent, with near 0 percent the optimum, with the engine running at operating temperature.
The Long Term FT parameter should be between +10 percent and -10 percent, with near 0 percent the optimum, with the engine running at operating temperature.