Fausti
Volvo XC60 unstable idle problem
(Translated from French)
Summary of the thread
A Volvo XC60 experiences unstable idle when starting from cold, which stabilizes once the engine warms up. The diesel filter was replaced, but the issue persists. A suggestion was made to check and clean the mass airflow sensor (MAF) for dirt or contamination, which could affect the air-fuel mixture. After cleaning the MAF, the problem seems to be resolved.
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5 comment(s)
CarlyMechanic
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Hello , On my 2015 Volvo xc60 diesel I have an unstable idle when the engine is cold. My mechanic has connected a case but does not see any error, he changed the diesel filter but it did not change anything. Thank you for your diagnostic answer.
Check the mass airflow sensor (MAF) for dirt or contamination, as it can affect the air-fuel mixture and cause unstable idle when cold. Cleaning it might help. Let me know if this resolves the issue or if you need further assistance.
Fausti (community.author)
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Check the mass airflow sensor (MAF) for dirt or contamination, as it can affect the air-fuel mixture and cause unstable idle when cold. Cleaning it might help. Let me know if this resolves the issue or if you need further assistance.
Thank you for your reply, I have disassembled and cleaned the MAF and it seems to work. I will see how it is used, then I will come back to you. Thank you again.
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Fausti (community.author)
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Thank you for your reply, I have disassembled and cleaned the MAF and it seems to work. I will see how it is used, then I will come back to you. Thank you again.
Hello, I followed your advice, cleaned the MAF sensor, but the idle is still unstable when the engine is cold. Could this be caused by the EGR valve? Thank you in advance for your diagnosis.
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CarlyMechanic
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Hello, I followed your advice, cleaned the MAF sensor, but the idle is still unstable when the engine is cold. Could this be caused by the EGR valve? Thank you in advance for your diagnosis.
Yes, a faulty or clogged EGR valve can cause unstable idle, especially when the engine is cold. Consider inspecting the EGR valve for carbon buildup and cleaning it if necessary. Let me know if this helps or if you have any further questions.
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XC60
Fausti (community.author)
Hello , On my 2015 Volvo xc60 diesel I have an unstable idle when the engine is cold. My mechanic has connected a case but does not see any error, he changed the diesel filter but it did not change anything. Thank you for your diagnostic answer.
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