Conditions for Setting the DTCs (w/LLT)
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- An HO2S 1 signal voltage is between 400-520 mV, or 400-550 mV when the calculated exhaust temperature is greater than 800°C (1,472°F)
- The calculated internal resistance of an HO2S 1 is greater than 40,000 ohms when the calculated exhaust temperature is greater than 600°C (1,112°F).
- A corresponding HO2S 1 and HO2S 2 are greater than 200 mV during a decel fuel cut-off greater 3 seconds.
- DTC P0134 or P0154 set if any of the conditions above exist