Fehlercode-Index · medium
P1240
Sensor power supply circuit malfunction (TP Sensor, MAP Sensor, A/C Pressure Sensor)
Sensor power supply circuit malfunction (TP Sensor, MAP Sensor, A/C Pressure Sensor)
Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2
Common causes
- ECM to sensors sensor supply voltage circuit(s): short circuit to ground
- short circuit to high voltage
- open circuit
- high resistance TP Sensor
- MAP Sensor
- AC Pressure Sensor failure(s)
- high resistance APP Sensor
- TP Sensor
- IP Sensor
- FTP Sensor failure(s)
- Sensor power supply - malfunction
Quick checks
- Confirm freeze-frame and conditions when the code set
- Inspect connectors, grounds, and harness for the circuit named in the code
- Compare live sensor values vs expected (unplugged/biased sensors are common)