P0131

O2 Sensor Circuit Bank 1 Upstream - Short To Ground.

P0131 - O2 sensor circuit bank 1 upstream sensor.: Last occurrence - minimum signal

Possible causes:
1. Short circuit C0606/19 (N) - ground.
2. Short circuit C0606/9 (Y) - ground.
3. Connectors C0606, C0642.
4. O2 Sensor.

1. Short circuit C0606/19 (N) - ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

2. Short circuit C0606/9 (Y) - ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

3. Connectors C0606, C0642.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

4. O2 Sensor.
No detail available for this fault