P2251 is set when there is short battery or open in circuit (refer to DTC Detecting Condition).
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage Monitoring |
•
Lambda sensor circuit
•
Lambda sensor component | ||
Enable Conditions |
•
Engine running | |||
Threshold Value |
•
Short to battery on 'Current Pump Line', 'Current Adjust Line', 'Virtual Ground Line', 'Voltage Nernst Line'.
•
Open on 'Virtual Ground Line'. | |||
Diagnostic Time |
•
2.0 sec. | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
