P0051

O2 Sensor Heater Circuit Bank 2 Upstream Sensor - Short Circuit To Ground

P0051 - O2 sensor heater circuit bank 2 upstream sensor fault.: Last occurrence - minimum signal

Possible causes:
1. Short circuit C0604-13 (NR) - ground.
2. Short circuit C0604-16 (BR) - ground.
3. Connector C0604, C0645.
4. Oxygen sensor.

1. Short circuit C0604-13 (NR) - ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

2. Short circuit C0604-16 (BR) - ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

3. Connector C0604, C0645.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

4. Oxygen sensor.
No detail available for this fault