This DTC sets when the IAT value is higher than a calibrated value indicating that the rationality test has failed and could prevent one or more on board diagnostic (OBD) monitors from completing.
The ECM runs this logic after an engine OFF and a calibrated soak period (typically 6 - 8hours). This soak period allows IAT and other temperature sensors to stabilize and not differ by greater than a calibrated value. DTC P0111 sets when the IAT at engine start exceeds the other temperature sensors by greater than a calibrated value.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Out-of-range high | 1. Poor connection 2. IATS |
Enable Conditions |
•
(A) Vehicle speed > 31 mph(49.88 km/h)
•
(B) 24 kg/h < Air mass flow < 160 kg/h
•
After (A) + (B) condition for 8sec. | ||
Threshold Value |
•
IAT > 110 ℃(230 °F) | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
- | ||
Case 2 | DTC Strategy |
•
Electrical Check(Noisy signal check) | |
Enable Conditions |
•
- | ||
Threshold Value |
•
I IAT sensor voltage - Intergrated sensor voltage I > 0.498 V | ||
Diagnostic Time |
•
5 sec. | ||
MIL ON Condition |
•
- | ||
Case 3 | DTC Strategy |
•
Signal stuck check ;(Max-Min) IAT check after sufficient driving | |
Enable Conditions |
•
Vehicle speed < 3 mph(4.82 km/h) for 14 sec ≥ 5 times, and Air mass flow < 24 kg/h
•
Vehicle speed > 37 mph(59.54 km/h) for 8 sec ≥ 2 times, and 40 kg/h < Air mass flow < 300 kg/h
•
ECT at cranking < 75 ℃(167 °F) | ||
Threshold Value |
•
Max. IAT - Min. IAT < 1.5 ℃(34.7 °F) | ||
Diagnostic Time |
•
Immediate | ||
MIL ON Condition |
•
2 Driving cycles | ||
