P0231 is set when no current or excessively low current is detected in fuel pump relay control circuit for more than 1 sec. at fuel pump relay ON condition. This code is due to open or short to ground in fuel relay control circuit or internal open in fuel pump relay component.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage monitoring | 1. Fuel pump relay control circuit 2. Fuel pump relay component | ||
Enable Conditions |
•
IG key ON (monitoring only performed within relay operating condition) | |||
Threshold Value |
•
Short to ground in fuel relay control circuit.
•
Open in fuel relay control circuit. | |||
Diagnostic Time |
•
1.0 sec. | |||
Fail Safe | Fuel cut | NO |
•
- | |
EGR Off | NO | |||
Fuel Limit | YES | |||
Check Lamp | OFF | |||
