Question about 2004 Mercedes-Benz C-Class

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What doe the code mean p0171 for 2004 mercedes c230 and my check engin light is on? Can some one HELP me please

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  • Anonymous Mar 20, 2014

    2004 model the digital reading on the milometer etc has almost disappeared

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Either a vaccum leak, or a dirty mass air flow (maf) sensor. the sensor you can clean with crc maf cleaner spray at your local auto parts store. as for the vacuum leak, i heard there is a recall for m271 engines to replace two faulty vaccum lines. one line goes to the s/c, and i believe the other one is right next to it. check if your car needs this recall and go from there.

Posted on Dec 31, 2009

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Vaccum leak

Posted on Dec 13, 2009

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predator3272
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SOURCE: 2000 c230 mercedes po410 PO100 are all check

change CO2 sensor

Posted on Jan 29, 2010

kapishtech
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SOURCE: My C230 Mercedes has check engine light on. Car

P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks.Replace MAf sensor,if cleaning the MAF does not help.
Thanks.

Posted on Oct 01, 2010

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My C230 Mercedes has check engine light on. Car checked and the following codes were found: P0171 system too lean, P0300 random/multiple cylinder misfire, P0301, 302, 303, 304- meaning cylinders 1 - 4...


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks.Replace MAf sensor,if cleaning the MAF does not help.
Thanks.

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