OBII code parameters

[johnfin]

Where can I find the ranges for the live streaming sensors, fuel trims, O2 sensors, etc.

[pajeff02]

The service manual generally has that information in the troubleshooting sections. Do you have a specific question?

Fuel trims should be fairly close to zero -- which means that the PCM is not adding or subtracting fuel. Mine range around +/- 2 to 3 at the most if I recall. The O2 sensor output for the narrowband stock style sensors is essentially unreadable if it is working properly. They rapidly cycle up and down from around 100 to 800 mV, with 450 mV representing a stoichiometric mixture. If the sensor data is sluggish or not moving at all, there is generally a problem with the sensor or wiring.