Detection Condition
WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0112 indicates MAF/IAT sensor is less than self-test minimum of 0.2 volt or 250°F (121°C).
- DTC P0113 indicates MAF/IAT sensor is more than the self-test maximum of 4.6 volts or -58°F (-50°C).
- DTC P0117 indicates ECT sensor is less than self-test minimum of 0.2 volt or 250°F (121°C).
- DTC P0118 indicates ECT sensor is more than self-test maximum of 4.6 volts or -58°F (-50°C).
- DTC P0125 indicates ECT sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after engine start.
- DTC P0128 indicates ECT sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting engine.
- DTC P0298 indicates engine oil protection strategy in PCM has been activated. Temporarily prohibits high engine speed operation by disabling fuel injectors.
- DTC P1112 indicates MAF/IAT sensor signal was intermittent during Comprehensive Component Monitor.
- DTC P1116 indicates ECT sensor signal is out of self-test range (0.3-3.7 volts).
- DTC P1117 indicates ECT circuit was intermittently open or shorted while engine was running.
- DTC P1285 indicates an engine overheat condition was sensed by CHT sensor.
- DTC P1288 indicates CHT sensor is out of self-test range (engine not at operating temperature).
- DTC P1289 and P1290 indicates CHT sensor circuit malfunction (open or short).
- DTC P1299 indicates an engine overheat condition was detected by CHT sensor and a Failure Mode Effects Management (FMEM) strategy called. Fail safe cooling was activated to cool engine.
Engine must be at normal operating temperature to pass KOEO self-test and KOER self-test. Ambient temperature must be more than 50°F (10°C) to receive acceptable input from MAF/IAT sensor. MAF/IAT, ECT and CHT sensors are thermistor type (passive) sensors. PCM uses MAF/IAT input as a correction factor in calculation of fuel, spark and MAF/IAT. PCM also uses ECT and CHT sensors as inputs. On all sensors, resistance changes with temperature. Resistance decreases with temperature increase, and increases with temperature decrease.