Response Test Enable
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1997 GMC Yukon, 1997 GMC Suburban, 1997 GMC Pickup, 1997 GMC Cab & Chassis, and 1997 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Closed-loop low MAP not active.
- Closed-loop Mode 0 not active.
- DTCs P0131, P0132, P0134 and P0135 not active.
- System in "closed-loop".
- ECT greater than 135°F (57°C).
- Engine run time greater than 75 seconds.
- MAF greater than 15 gm/s with engine speed at less than 3000 RPM.
- Average response time calculations completed for this ignition cycle.
- Ratio of left HO2S left right/right left times greater than 64 counts.
- Ratio of left HO2S left right/right left times greater than 48 counts.
- Canister purge duty cycle is greater than zero percent.
- Conditions present for greater than 2 seconds.