I have a 2000 Volvo non turbo s80 2.9 - I have seen people talking about a tranmission issue. Mine is a bit different. After about 10 mins of driving, it will accelerate VERY slowly from a dead stop. However, if I turn off the engine, it will be have normally for another few minutes. Ideas?

Question edited for clarity.
Question moved to model category.

This is a strange code that doesn't appear to have one definitive reason, it's a bit of "you have a bit of a problem, but we aren't sure". Just Answer dot com mechanic says it is the MAF Sensor.

https://p1004-volvo.autotroublecode.com/

http://p1004.engine-trouble-code.com/

I have a 99 s70 volvo that has a p1004 code. I've been told

JustAnswer https://www.justanswer.com > volvo > iq32q-99-s70-v...
Feb 12, 2022 - On newer vehicles, the P1004 is for the short runner valve which is internal to the intake manifold and makes sure there is even air ...

1 answer · Top answer: HI This is 100% unrelated to your original question. I will answer this as a courtesy, but ...

Have 1999 Volvo S70 Non-Turbo. Codes are P0420, ...

AutoCodes https://www.autocodes.com > have-1999-volvo-s70-n...
Apr 24, 2017 - Have 1999 Volvo S70 Non-Turbo. Codes are P0420, P0645, P1004, P1081, Symptom= intermittent stall. NO Check engine light on. Seems to accelerate ...

if you remove the turbo from that car, the car will not run very well because the computer is setup to run with a turbo device, it need the air flow to force the fuel where it need to go. after removing the turbo you are going to have fuel issue, stay running, be fore you buy it go to the owner ask if they would mind if you or them disconnect the belt from the turbo charger and restart the car, see how well it runs, try and drive it, if every thing works okay, than buy the car and leave the belt off the charger.

https://www.matthewsvolvosite.com/forums/viewtopic.php?t=6941
I found this one when working on mine. I hope it helps you.

sounds like a coil issue

on top of the bell housing of the tranmission it have one bolt a 10 mm

this trans is well known for valve body issues

The bad news is the only part that is connected to all of these is the ECM or computer.

The fuel filter can be located under the carpeted cargo storage floor at the rear of the wagon. Remove the four 10mm bolts, remove the cover. You will then see a removable plate to the right just behind the rear passenger seat. Fuel filter can be seen through hole in hole. Replaced from underneath wagon. Be sure to make sure lines are fully inserted onto filter. Check for leaks. Note arrow on filter for correct fuel flow. Good luck and hope this helps and no smoking please LOL

po455 could actually be a loose or deffective gas cap

I am a volvo tech and your problem is fuel pressure ralated and i had same problem in 1995 850 turbo and the fuel pump was the problem and a used one is around 35.00