Diagnostic Trouble Code (DTC) Information

ECM-4020 FUEL TANK PRESSURE SENSOR
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
Diagnostic trouble code (DTC) ECM-4020 is stored if the engine control module (ECM) registers that the voltage exceeds 4.9 V or is less than 0.3 V (for 15 seconds). This is interpreted by the engine control module (ECM) as a faulty signal to the fuel tank pressure sensor.

Condition
The engine control module (ECM) assumes a fuel tank pressure of 0 hPa.

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- open-circuit in the signal cable
- defective fuel tank pressure sensor.

Signal too low:
- short-circuit to ground in the signal cable
- loose connections in the connectors
- defective fuel tank pressure sensor

Condition
Malfunction indicator lamp (MIL) lit.