DD15 SPN 164/FMI 5 Troubleshooting

SPN 164/FMI 5

The fault condition is typically Rail Pressure Sensor circuit open or a stuck in range sensor.‪

Check as follows:‪

1. Check for multiple codes
   1. If additional fault codes are present with 615/14, service the additional fault codes first.
   2. If only 615/14 is present go to the next step.
2. Turn the ignition OFF.
3. Disconnect the Rail Pressure Sensor.
4. Turn the ignition ON (key ON, engine OFF).
5. Check for 5 volt supply at pin 3 of the Rail Pressure Sensor.
   1. If voltage is correct, replace the Rail Pressure Sensor. Refer to “31.6.1 Verify Repairs” .
   2. If no voltage was found, repair the circuit between pin 3 of the Rail Pressure Sensor and pin 58 of the MCM 120 MCM connector.