P2235

P2235

Oxygen sensor, implausible signal

Diagnostic conditions
- DME control module supply voltage 10 V ... 16 V
- Oxygen sensor heater switched on at > 70 s
- Exhaust temperature 350 ... 800 °C
- No other oxygen-sensor faults stored

Possible fault causes
- High resistance short circuit to B+ in signal wire
- Heater injection
- Oxygen sensor faulty
- DME control module faulty