Diagnostic Aids
- DTC P0116 is designed to detect an ECT sensor that is skewed high.
- An IAT sensor that is skewed low could cause this DTC to set.
- A skewed sensor is the problem. See appropriate SENSOR RESISTANCE table in appropriate SENSOR OPERATING RANGE CHARTS article.
- If engine has been allowed to sit overnight, the ECT and IAT temperature should be within the calculated amount.