I have a 2000 E320 and for the past year have had my engine light on with codes 170 and 173 (which I know are indications for Mass Air flow). However, last weekend I encountered a new problem which sounds very much like yours. I have checked the codes and I get P0300-P0306. ( cylinder misfire). If I go for service A (which is due now) and if I change the Mass Air flow would this problem ( engine idling and timimg off beat) go away.
I have a 2000 E320 and for the past year have had my engine light on with codes 170 and 173 (which I know are indications for Mass Air flow). However, last weekend I encountered a new problem which sounds very much like yours. I have checked the codes and I get P0300-P0306. ( cylinder misfire). If I go for service A (which is due now) and if I change the Mass Air flow would this problem ( engine idling and timimg off beat) go away.
Thanks for your help.
Manouch
Hi, and welcome to the forum. Sometimes when you let a CEL continue (instead of repairing the underlying problem) the result will be that other parts are damaged, resulting in more codes. As an MAF continues in error code condition it is possible that it will get dirtier, etc. ultimately leading to cylinder misfire.
FYI, neither service A nor service B have anything to do with repairing codes. Your service provider certainly will download them and offer to do the repairs, but it's not part of the regular service. (Your owner's manual will tell you what's included in the A and B service procedures.)
Replace the MAF and keep your fingers crossed, if you've not done other damage then after a few days' driving the CEL will go out on it's own, or you can use a proper OBD-II meter to clear the codes after you replace it.
Take care and enjoy the ride,
Greg
__________________ If the only prayer you say in your life is thank you, that would suffice. Meister Eckhart
When you learn from your own mistakes, that's experience.
When you learn from the mistakes of others, that's wisdom.
When you fail to learn from any mistakes, that's government.
Replace the MAF and keep your fingers crossed, if you've not done other damage then after a few days' driving the CEL will go out on it's own, or you can use a proper OBD-II meter to clear the codes after you replace it.
Take care and enjoy the ride,
Greg
I was reading a free issue of Grassroots Motorsports that came in the mail today. There's a new MAF cleaner called CRC Mass Air Flow Sensor Cleaner. You can get it from all sorts of different places for about six bucks. I'm going to try it on my MAF when I change the plugs.
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Take good care of your car and it will take good care of you.
The guys in the 210 AMG forum have used the CRC MAF Cleaner & seem to have been pleased with the results; may not always work but well worth a $$ saving try.
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'87 300E: sold after 11years @ 230k & still on the road somewhere in rural Tennessee.
'94 C220 with 93k totalled 10/06 by hit & run broadsiding monster truck: not a scratch or bruise for me
the cleaner works, all it is is electronics cleaner. make sure you take the maf apart first and hose down the element real good w/ the cleaner. if that was the problem and the only problem, the cel will go out after about 45 minutes of continuous driving. good luck.
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