Signal Too High. Permanent Fault
Signal too high. Permanent fault
Checking the boost pressure sensor signal
- Ignition on
- Activate the read off for the programmed values
- Check that the value from the boost pressure sensor does not deviate from the manifold absolute pressure (MAP) sensor by more than 200 mbar. The value for the manifold absolute pressure (MAP) sensor is used as a reference value for this test.
Select one of the following alternatives to continue:
1. The value for the boost pressure sensor is more than 200 mbar higher than the value for the manifold absolute pressure (MAP) sensor
2. The values for the boost pressure sensors are approximately the same.
1 - Replacing the component
2 - Checking the connectors and the boost pressure system
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Checking the connectors and the boost pressure system
- Ignition off.
Check the connector on the boost pressure sensor. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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 does not stick in the closed 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 in particular the hoses and the function of the pressure regulator.
Try a new boost pressure sensor if no fault is found during the above fault-tracing.
Remedy as necessary.
Other information
- Boost pressure sensor 1, replacing Boost Pressure Sensor 1, Replacing
Continue - Verification
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Replacing the component
- Ignition off
- Check the connector on the boost pressure sensor and the control module. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Try a new boost pressure sensor if no fault is found in the connectors.
Other information
- Boost pressure sensor 1, replacing Boost Pressure Sensor 1, Replacing
Continue - Verification
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Checking the boost pressure sensor signal
- Reinstall the connectors
- Ignition on.
Read off the boost pressure sensor and atmospheric pressure sensor values.
Check that the boost pressure sensor value does not deviate from the atmospheric pressure sensor value by more than 200 mbar. The value for the atmospheric pressure sensor is used as a reference value for this test.
Try a new boost pressure sensor if the boost pressure sensor value does not correspond to the atmospheric pressure sensor value to an accuracy of 200 mbar.
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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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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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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