P0108
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Engine speed drops slower than normal when accelerator pedal released.
Possible misfiring before diagnostic trouble code is generated.
Manifold Absolute Pressure Sensor Circuit. Short to B+.
Fault symptoms
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Engine speed drops slower than normal when accelerator pedal released.
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Possible misfiring before diagnostic trouble code is generated.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. However, it is interrupted once the fault criteria have been fulfilled and does not restart until the next driving cycle.
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Enable criteria:
(Conditions that must be fulfilled for diagnostics to be performed.)
Fault criteria:
(When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)
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Voltage higher than 4.815 V for more than 1 s.
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Dependents:
(Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)
System reaction to a fault:
(Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)
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Purge is blocked. Correction of air mass/combustion for fuel calculation is blocked.
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OK report:
(This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)
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P0106 Test 1 and Test 2 performed once and fault criteria not fulfilled. Fault criteria for P0107 or P0108 not fulfilled.
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Fault handling:
(Refer to section “Fault diagnosis, general” for more information.)
Diagnostic help
Fault diagnosis concerns an electrical fault in the connecting leads or in the sensor.
Diagnostic tool functions related to this fault:
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Pressure sensor reading, unit kPa. The value should correspond with the those of the other two sensors when the engine is stationary. Permitted deviation is 10 kPa.
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Refer also to the description of readings under ”Fault diagnosis, general” for more information
Check the wiring
Jiggle the wiring harness at several points and in different directions to check if there are intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic instrument during the test.
See
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