DTC Advanced Diagnostics: P011A (2.0L Engine) (2024 2025)
DTC P011A : Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance Problem
General Description
The powertrain control module (PCM) monitors engine coolant temperature (ECT) sensor 1 for electrical malfunctions. In order to provide diagnosis the measured engine coolant temperature is monitored against expected engine coolant temperature at engine start. The expected engine coolant temperature is a modeled temperature which represents the lowest possible heating up of engine coolant temperature. The measured engine coolant temperature is always higher than expected temperature value in case of valid sensor. If the difference between the ECT sensor 1 output temperature and mean value of all temperature sensors at cold start is more than a specified value for a specified time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Once per driving cycle |
| Sequence | None |
| Duration | 90 seconds or more |
| DTC Type | Two drive cycles, MIL on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Engine off time | 6 hours | - |
| State of the engine | Running | |
Malfunction Threshold
The absolute difference between the ECT sensor 1 output temperature and mean value of all temperature sensors at cold start is more than 44 deg.F (24 deg.C) for at least 90 seconds.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- ECT sensor 1 failure
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
Start the engine and drive the vehicle for at least 2 minutes.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC, the freeze data, and the on-board snapshot are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.