Signal Too High. Permanent Fault
Signal too high. Permanent fault
Checking the boost pressure sensor signal
- Ignition on
- Activate the readout of boost pressure sensor values.
- Check that the value from boost pressure sensor 2 (MAP) does not deviate from that of boost pressure sensor 1 (BOP) by more than 200 mbar. Boost pressure sensor 1 (BOP) is used as the reference value in this test.
Select one of the following alternatives to continue:
1. The value of boost pressure sensor 2 (MAP) is higher than that of boost pressure sensor 1 (BOP) by more than 200 mbar.
2. The values of the boost pressure sensors are about the same.
1 - Replacing the component
2 - Checking connectors and the boost pressure system
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Checking connectors and the boost pressure system
- Ignition off
Check the connector of boost pressure sensor 1 (MAP) for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Release the wastegate as described in Checking and adjusting the boost pressure control (BPC) valve on the turbocharger (TC) Adjustments. Check that the wastegate does not seize or get stuck in the closed position.
Check the turbocharger as described in Checking boost pressure with manometer while test driving the car Checking Boost Pressure With Manometer While Test Driving The Car. Especially check the function and hoses of the pressure regulator.
If no fault is detected during the above fault tracing, try a new boost pressure sensor 2 (MAP).
Remedy as necessary.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Test drive the car with changing throttle opening and at constant throttle opening. This will ensure that the boost pressure system operates throughout the entire range
- Connect the VIDA station
- Ignition on
- Check if the diagnostic trouble code (DTC) status has changed to intermittent. If it has, the fault has been remedied.
Has the status of the diagnostic trouble code (DTC) status changed?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Replacing the component
- Ignition off
- Check the connector of boost pressure sensor 2 (MAP) and the control module for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If no faults are found on the connectors, try a new boost pressure sensor 2 (MAP).
Other information
- For boost pressure sensor 2 (MAP) replacement, see Boost pressure sensor 2, replacing Boost Pressure Sensor 2, Replacing.
Continue - Verification
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Checking the boost pressure sensor signal
- Restore the connectors.
- Ignition on
Activate the readout of boost pressure sensor and atmospheric pressure values.
Check that the value from boost pressure sensor does not deviate from that of the atmospheric pressure sensor by more than 200 mbar. The atmospheric pressure sensor is used as the reference value in this test.
If the value of the boost pressure sensor is not within 200 mbar of the atmospheric pressure sensor, try a new boost pressure sensor.
Other information
- For boost pressure sensor replacement, see Boost pressure sensor 2, replacing Boost Pressure Sensor 2, Replacing.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Reinstall the components, reconnect the connectors etc.
- Ignition on.
- Read off boost pressure sensor 2 (MAP sensor) and boost pressure sensor 1
- Check that the boost pressure valve values are the same. Check that the boost pressure sensor values are within 200 mbar of each other
Are the values for the boost pressure sensors approximately the same?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the boost pressure sensor signal
FAULT-TRACING FAILED - No Fault Found
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