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P0108

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE lamp on. Loss of performance.

P0108


Manifold Absolute Pressure Sensor Circuit. Short to B+.

Fault symptoms


• CHECK ENGINE lamp on.

• Loss of performance.


On-Board Diagnostics

Type of diagnosis:


- Continuous.


Enable criteria:


- Turn Ignition On.


Fault criteria:


- When the voltage on the input is greater than 4.9 V for more than 0.5 seconds.


System reaction to a fault:


- Limp Home, torque limitation.

- EGR control and boost pressure control are deactivated.

- The control module uses a substitute value of 101.3 kPa.


Check the wiring

A fault in the control module's female connector can generate a DTC. Check the contact for oxidation, dislodge pins and pin clamping force.

Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this. Check switches, connectors and crimp connections for oxidation, dislodged pins and pin clamping force.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Diagnostic tool functions related to this fault are:


• Read value:

• BOOST PRESSURE


For more information, see also:

- "Read Values" menu for a description of read values.

- "Activate" menu for a description of applications.