P1D30

P1D30-OIL VISCOSITY TOO LOW

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The output from the viscosity sensor to the Powertrain Control Module (PCM) is a pulse width modulated (PWM) signal that is translated by the PCM into a viscosity value. When the oil temperature is between -25°C (-13°F) and -35°C (-31°F) the PCM will use the signal from the viscosity sensor to determine the oil viscosity level. If the PCM determines that the oil viscosity is too low (oil is too thick), the glow plug light on the dash will flash and a text message will appear on the EVIC instructing the operator to wait to start the engine.

- When Monitored:
Ignition on, engine running and oil temperature is between -25°C (-13°F) and -35°C (-31°F).

- Set Condition:
When the Powertrain Control Module (PCM) recognizes the Oil Viscosity is too low for proper engine operation. The engine will not be allowed to start.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, clear DTCs.
3. Turn the ignition on.
4. Attempt to start the engine.
5. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test.

2. ENGINE OIL TOO COLD
1. Place the vehicle in an environment where the oil temperature can get over -25°C (-13°F).
2. With the engine oil temp over -25°C (-13°F) turn the ignition on and attempt to start the engine.
3. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Change the engine oil and oil filter using the proper viscosity oil.

No

- Test Complete.