Oxygen sensor 2
- If the current in the oxygen sensor pre-heating circuit is too low, diagnostic trouble code P1141 will be generated.
- If the current in the oxygen sensor pre-heating circuit is too high, diagnostic trouble code P1142 will be generated.
- If the sensor lead is short circuited to B+, diagnostic trouble code P0138 will be generated.
- If there is an open circuit on any of the leads for the sensor ground or sensor voltage, or if the sensor voltage is short circuited to ground, diagnostic trouble code P0140 will be generated.
- If the sensor lead is short-circuited to the preheating circuit ground, diagnostic trouble code P1137 will be generated.