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P2122 codes

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
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Ftknox1301
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P2122 codes

Post by Ftknox1301 » Mon Jan 06, 2020 7:36 pm

Greetings everyone. The other day my wife's a 01 XC70 broke a serpentine belt, she was able to drive the car to a safe location and of course eventually everything shut off on her from running on just the battery. I replaced the belt and took the car out for a test drive only to find out it would only go up to about 30 miles per hour. I pulled the trouble codes (OBD2 scanner, don't own Vida/Dice) and got P2122 and P2121 codes. From the research I have seen this can be related to either of the throttle body or the accelerator pedal, any advice on this issue would be greatly appreciated. Thank you.
Last edited by matthew1 on Tue Jan 07, 2020 11:38 am, edited 1 time in total.
Reason: improved title

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SuperHerman
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Re: P2122 codes please help

Post by SuperHerman » Mon Jan 06, 2020 8:08 pm

My sister's 2002 XC70 suffered similar codes and drive problems - after replacing the pedal with no change the diagnostic tree suggested a relay may be the cause. I was not there, but check your relays including those in the trunk area before you start throwing parts at it.

Hopefully the legend RickHaleParker can chime in and point you to the potential offending relay's location and part number. You might be able to swap it with another relay of the same part number for test purposes that is on the board.

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RickHaleParker
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Re: P2122 codes please help

Post by RickHaleParker » Mon Jan 06, 2020 10:43 pm

Ftknox1301 wrote: ↑
Mon Jan 06, 2020 7:36 pm
P2122 and P2121 codes. From the research I have seen this can be related to either of the throttle body or the accelerator pedal, any advice
Both: Accelerator pedal sensor, electrical connector or wiring (Open-circuit or short-circuit).
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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SuperHerman
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Re: P2122 codes please help

Post by SuperHerman » Tue Jan 07, 2020 12:58 am

RickHaleParker - correct and at the end of the wiring loom is most likely the possible offending relay. I gave my sister my VIDA set up along with my 2004 XC90

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vtl
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Re: P2122 codes please help

Post by vtl » Tue Jan 07, 2020 7:07 am

Clean the codes, they may have beeen recorded when the modules were shutting off because low voltage.

Also it is typical for the timing belt to jump one teeth or more when the drive belt snaps. Check the timing.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

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Re: P2122 codes please help

Post by Ftknox1301 » Tue Jan 07, 2020 7:10 am

vtl wrote: ↑
Tue Jan 07, 2020 7:07 am
Clean the codes, they may have beeen recorded when the modules were shutting off because low voltage.

Also it is typical for the timing belt to jump one teeth or more when the drive belt snaps. Check the timing.
Cleared the codes but they come back immediately without even showing a check engine light???

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vtl
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Re: P2122 codes please help

Post by vtl » Tue Jan 07, 2020 7:13 am

Ftknox1301 wrote: ↑
Tue Jan 07, 2020 7:10 am
Cleared the codes but they come back immediately without even showing a check engine light???
Looking at standard OBD-II P-codes, not Volvo-specific, you did not clear all of them: need DiCE/VIDA to do so.

Did you check fuses/relays? In VIDA it is also possible to run accelerator pedal test.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

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Re: P2122 codes please help

Post by Ftknox1301 » Tue Jan 07, 2020 7:43 am

vtl wrote: ↑
Tue Jan 07, 2020 7:13 am
Ftknox1301 wrote: ↑
Tue Jan 07, 2020 7:10 am
Cleared the codes but they come back immediately without even showing a check engine light???
Looking at standard OBD-II P-codes, not Volvo-specific, you did not clear all of them: need DiCE/VIDA to do so.

Did you check fuses/relays? In VIDA it is also possible to run accelerator pedal test.
About to start pulling relays now, waiting on my wife to get back with my 04 XC so I can use some of the relays out of it to swap with hers since I know all of mine are good. Any idea which relays may be the culprit?

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Re: P2122 codes please help

Post by Ftknox1301 » Tue Jan 07, 2020 8:43 am

Okay so far I have swapped all relays both in the trunk as well as under the hood with no change. I have unplugged the wiring harness that goes to the throttle body cycled the key a few times then plugged it back in also with no change. What should I try next?

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vtl
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Re: P2122 codes please help

Post by vtl » Tue Jan 07, 2020 9:45 am

Get VIDA/DiCE, read the Volvo-specific codes, post here?
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

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