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Fault code p1221 - V40 Volvo Cars & Trucks

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What year and model do you have?

Posted on May 21, 2011


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2003 gmc envoy... I was told i needed a fan clutch.... Then. Next thing i know check engine soon, reduce engine power... Whats going on then computer... P1221, 1271, 1635 still not fix


if you were told that the fan clutch needed replacing and you did not do that , then the engine light and the loss of power would be a result of overheating of the engine and it going to limp mode
take it to a gm service centre for a explanation of the fault codes

Feb 12, 2017 | 2003 GMC Envoy

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Fault code p1221


need to know the vehicle make as different manufacturers use different codes at times , for example ford, jaguar and mazda use this code for fuel pressure related problems

Feb 23, 2015 | Cars & Trucks

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U1000 code


You are loosing the % volt reference signal to the accelerator pedal postion sensor. Could be a faulty sensor or a wiring issue between the pcm and the app sensor on your gas pedal.

Jul 02, 2014 | 2002 Chevrolet TrailBlazer

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I keep getting all these cods p0102 p1120 p1220 p1221 p1514 p1516 p0102 p1120


Hi Robert, It would help us to know which vehicle as the codes very well may be vehicle specific.Ford seem to have codes of that numerical range, so I'm assuming your vehicle is made by Ford.
P1120 refers to the Air flow sensor. P1120 the throttle position sensor. 1220 Series Throttle Control Fault (probably related to the TPS) 1221 Refers to the high speed fuel pump relay having been activated. 1516 Intake manifold runner input error. Cannot find P1514 Hope this is helpful. I suggest sorting out the air flow sensor and the throttle position sensor to begin with and that may sort out the other defects. Very often one sensor giving an error reading will trigger others. Regards John

Oct 12, 2013 | Cars & Trucks

1 Answer

P1221


No reason to replace any of those 3 parts,
until you not only use the scan tool to look at data,
but back probe & test them
Did even one fail a test or were they even tested?
What vehicle & motor?
You need factory trouble charts, to provide some info,
& help there -- on any vehicle or any issue

Jul 21, 2013 | Cars & Trucks

2 Answers

Fault code PO1221


P01221 is not valid, to many numbers. If this is a P1221 then read on. Otherwise retest.
You have either a Mass Airflow signal issue or you have low fuel pressure. Have both values checked for problems.

Jul 11, 2012 | 2000 Volvo S40

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Code p1221 on 2002 Chevy Trailblazer


its drive by wire system you need a new throtlebody/ acuator

Jun 15, 2012 | Chevrolet TrailBlazer Cars & Trucks

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My 1999 vett got wet and stalled . When dried out started and it ran good for about 5 miles then engine service light and traction control light on dash went on, it also said reduced engine power. Checked...


Hello my name is Ben. Those are both throttle position sensor codes. Considering that you said it got wet, there may be some water hidden in the connectors of the Throttle Actuator Control module. There is an access panel in the passenger front wheel well. I would remove that panel and check the connectors on the module. They must be clean, dry and tight. While you are there examine all the wiring. Also, pull the passenger's side floor mat and feel for wetness, then check the passenger's fuse box behind that little piece of carpet for water infiltration. Hope this helps, Ben.

Aug 09, 2010 | 1999 Chevrolet Corvette

1 Answer

I have 2001 carisma 1.8 gdi with a trouble code p1221, what is tis, thanks


It is an issue which concerns the throttle and the throttle body. Have the pedal position also checked.. normally this code is also associated with high reving then going into gear.

Jun 03, 2009 | 2002 Mitsubishi Lancer

2 Answers

1997 corvette


brutus96 contact me at lynng2006@comcast.net i had the same problem i might be able to help. (313)492-5321 george

May 28, 2008 | 1997 Chevrolet Corvette

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