If open or short to power in signal circuit of downstream lambda sensor is detected, ECM sets DTC P22AD00.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage monitoring | 1. Poor connector connection 2. Short to power in signal circuit of downstream lambda sensor 3. Faulty downstream lambda sensor | ||
Enable Condition |
•
Engine running | |||
Threshold Value | Case 1 |
•
Open in current adjust line | ||
Case 2 |
•
Output temperature is less than 720℃(1,328℉) | |||
Case 3 |
•
Short to power in signal circuit (Pumping cell, Current adjust, Virtual ground, Nernst cell) | |||
Case 4 |
•
Calculated lambda sensor temperature exceeds maximum specification | |||
Detecting Time | Case 1 |
•
2 sec. | ||
Case 2 |
•
60 sec. | |||
Case 3 |
•
2 sec. | |||
Case 4 |
•
30 sec. | |||
Fail Safe | MIL |
•
On | ||
