If open or short to ground in signal circuit of front lambda sensor is detected, ECM sets DTC P223800.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Voltage monitoring | 1. Poor connector connection 2. Open or short to ground in signal circuit of upstream lambda sensor 3. Faulty upstream lambda sensor | |
Enable Conditions |
•
Engine running | ||
Threshold Value |
•
Open in Nernst cell line
•
Open in Pumping cell line
•
Output signal is below 0.2V
•
Short to ground in signal circuit (Pumping cell, Current adjust, Virtual ground, Nernst cell) | ||
Diagnostic Time |
•
0.24 sec. | ||
Fail Safe | MIL |
•
On | |
LNT Regeneration OFF |
•
Yes | ||
