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MAF failure

  • Manual-Mecanica
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11 years 1 month before #46330 by manual-mecanica
MAF failure published by Manual-Mecanica
Good day.
I am looking for a procedure to test the MAF sensor of a Volvo S60 Model 2005.
Mark errors P0101 and P0102, if I delete them when the car turned on, it drowns the 5 seconds, if I disconnect the MAF sensor, the engine starts without problem.
Initially I had diagnosed me fault in the secondary vacuum sensor of the Booster.
I am waiting for your comments.
Greetings,

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11 years 1 month before #46339 by manual-mecanica
Manual-Mecanica response on the subject failure in MAF
Try to give it a cleaning with a CRC spray before anything else (the Maf and the contacts of the contacts), they usually get dirty and verify that none of the cables is peeled.
It seems to me and gives me the spine that the resistance of the MAF does not detect the air that crosses it and then does not inform the UCE of any air input, and if it does not receive a sign of the mass of air does not give the order to inject fuel, but when you disconnect it the UCE detects that there is no MAF since it does not give it feeding and adjusts to basic operating parameters.

The MAF sensor consists of a resistance that varies according to the input temperature and a hot sheet that is maintained at 70º degrees (the temperature of this is detected with a resistance). If the ambient temperature is 20º, it informs the UCE and in turn increases the feed voltage to the hot sheet to keep it at 70º. In this way the UCE makes the calculation.

Conclusion: If you do not solve it with the spray and the cables are correct and isolated change it since the failure P0102 indicates a cut to mass. All the best:)

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11 years 1 month before #46340 by manual-mecanica
Manual-Mecanica response on the subject failure in MAF
Try to give it a cleaning with a CRC spray before anything else (the Maf and the contacts of the contacts), they usually get dirty and verify that none of the cables is peeled.

It seems to me and gives me the spine that the resistance of the MAF does not detect the air that crosses it and then does not inform the UCE of any air input, and if it does not receive a sign of the mass of air does not give the order to inject fuel, but when you disconnect it the UCE detects that there is no MAF since it does not give it feeding and adjusts to basic operating parameters.

The MAF sensor consists of a resistance that varies according to the input temperature and a hot sheet that is maintained at 70º degrees (the temperature of this is detected with a resistance). If the ambient temperature is 20º, it informs the UCE and in turn increases the feed voltage to the hot sheet to keep it at 70º. In this way the UCE makes the calculation.

Conclusion: If you do not solve it with the spray and the cables are correct and isolated change it since the failure P0102 indicates a cut to mass. All the best:)

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