TSP Heated Oxygen Sensor (H2OS) Adaptive/Multiplier Circuit Signal
Outside Of Acceptable Limits

here are some possible causes of this problem:

- High secondary fuel pressure
- Worn fuel mixer
- Faulty Pressure Trim Valve (PTV)
- Faulty fuel trim valve
- Fuel quality (Very high butane content)

if problem persists after correcting the previous problems then replace the H2OS sensor

If problem persists after replacing H2OS sensor then replace ECU

this should guide you in the right direction :o)