DTC EFI-621 Fuel Tank Pressure Sensor Signal

6-2-1 FUEL TANK PRESSURE SENSOR, SIGNAL

Trouble Code Condition(s)
- Diagnostic trouble code (DTC) EFI-621 Tank pressure sensor, signal is stored if the control module receives a signal from the tank pressure sensor corresponding to a pressure above 2.95 kPa (high signal) or below -2.88 kPa (low signal).

Substitute value(s)
- Leakage diagnostic is turned off.

Possible source(s)
Signal too high:
- Short-circuit to supply voltage in signal cable.
- Open-circuit in signal or ground lead.
- Contact resistance in terminals.
- Defective fuel tank pressure sensor.

Signal too low:
- Short-circuit to ground in signal cable.
- Open-circuit in power cable.
- A/C pressure sensor power cable short-circuit to ground.
- Short-circuit to ground in accelerometer power cable.
- Short-circuit to ground in power cable.
- Contact resistance in terminals.
- Defective fuel tank pressure sensor.

Fault symptom(s)
- None.