P2238 is set when 1) short to ground in signal line(terminal 4), ground line(terminal 3), power line(terminal 1), pumping current line(terminal 6) or 2) open in ground line is detected. This code is due to the problem of O2 sensor circuit.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage Monitoring |
•
Lambda sensor circuit
•
Lambda sensor component | ||
Enable Conditions |
•
Engine running | |||
Threshold Value |
•
Short to GND in Lambda sensor circuit
•
Open in Lambda sensor circuit
•
Output signal below 0.2V | |||
Diagnostic Time |
•
2.0 sec. | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
