Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking for air leakage and the turbocharger (TC) control system
- Check the engine intake system according to intake system/leak test Intake System/Leak Test. Check in particular the charge air pipe and the intake manifold for air leakage
- Release the boost pressure control (BPC) valve according to Checking and adjusting the boost pressure control (BPC) valve on the turbocharger (TC) Adjustments. Check that the boost pressure control (BPC) valve is unimpeded and does not stick in the open position
- Check the turbocharger (TC) according to Checking boost pressure with manometer while test driving the car Checking Boost Pressure With Manometer While Test Driving The Car
- Check the air cleaner (ACL) for blockage
- Remedy as necessary.

Was a fault detected?

Yes - Fault-tracing information

No - Checking the cable and component

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Checking the cable and component








- Ignition off
- Check the control module and mass air flow (MAF) sensor connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. Check for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. In particular, check for any damage
- Remedy as necessary.

Other information
- To replace the mass air flow (MAF) sensor, see Replacing the mass air flow (MAF) sensor Service and Repair.













Select "Continue" when the fault has been remedied.

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking for air leakage and the turbocharger (TC) control system

FAULT FOUND - DONE

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