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Old 10-22-2012, 09:35   #1 (permalink)
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09 focus,low idle

my sister is having issues with her 09 focus 2.0l. she says it idles too low ( around 450-500 rpm ).also pings like spark knock when it is in overdrive. 35k on this car.been to dealer,no dtc detected. car seems to run fine otherwise. don't want to spend a fortune playing hit-or-miss, thought maybe IAC module,or mass air flow? possibly E.G.R. issue? any sugestions?
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Old 10-22-2012, 11:04   #2 (permalink)
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Re: 09 focus,low idle

Could try cleaning the MAF . There is a TSB but it refers to 2010 models .

TSB #10-21-6

DTC P2111 OR P2112, OR LOWER THAN DESIRED ENGINE IDLE SPEED, ENGINE IDLE SPEED FLUCTUATES WITH OR WITHOUT DTC'S.

2010-2011 focus

ISSUE
2.0L may exhibit diagnostic trouble codes P2111, P2112, or the idle speed drops lower than desired and or fluctuates. The idle speed concern can be intermisttent and DTC's P2111, P2112 may or may not be present.

Applies to 2.0L engine with build dates from 2/11/2010 to 8/2/2010

SERVICE PROCEDURE

If vehicle exhibits any of the following symptoms, replace the throttle body

DTC P2111 and or P2112

Idle speed lower than desired

Idle speed fluctuates
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Old 10-22-2012, 12:31   #3 (permalink)
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Re: 09 focus,low idle

THX. she said the dealership cleaned the intake and throttle body.cost was 100.00. I can only asume they would have checked and/or cleaned the MAF. I am trying to gather ideas as to what might cause this problem,she lives in Pa.,I'm in Tn. but i will see her in 2 weeks and am hoping i can narrow it down by then! All ideas are welcome.I will also check Alldata for bulletins on this issue.
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