P0069

P0069-BOOST KEY ON RATIONALITY





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

While the key is on.

- Set Condition:

The boost pressure recorded at key on is not within a calibrated range from the inlet air pressure sensor.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. OTHER DTC'S PRESENT

With the scan tool, read DTCs.

Are any DTC's present for Inlet air pressure or boost pressure?

Yes

- Repair other DTC's first.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 2

2. COMPARE THE INLET AIR PRESSURE

Using the scan tool, compare the inlet air pressure (barometric pressure) sensor reading to the boost pressure sensor reading.

Are the pressure readings within 6 in Hg of each other?

Yes

- Go To 5

No

- Go To 3

3. INLET AIR PRESSURE SENSOR

Turn the ignition on, engine off.

Using the scan tool, read the inlet air pressure sensor value.

Is the inlet air pressure sensor reading consistent with the barometric pressure for the geographic region?

Yes

- Go To 4

No

- Relace the inlet air pressure sensor.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

4. BOOST PRESSURE SENSOR

Using the scan tool, read the boost pressure sensor value.

Is the Boost pressure sensor reading consistent with the barometric pressure for the geographic region?

Yes

- Go To 5

No

- Relace the Boost pressure sensor.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

5. INTERMITTENT CONDITION

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wiring and connectors while checking for any possible open or shorted circuits.

Check for any Technical Service Bulletins that may apply.

Were there any problems found?

Yes

- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Test Complete.
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