P2097...driving me bonkers... yes, AGAIN (P2 - 2002 V70 2.4T) Topic is solved

Jonboy74 · Post by **Jonboy74** » 09 Oct 2021, 23:01

I'm about to go out of my mind on this one....

A year ago I replaced the TCV/BCS hoses. V70 2.4T (P2) ECM-262A (P2097) -upper O2 sensor? -nope! Vacuum & Evap leak!

A little over a week ago (P2097 Woes... AGAIN.... V70 2.4T (P2)) I replaced the TCV/BCV Solenoid and last week I replaced the evap hose assembly Volvo Evap Hose - Genuine Volvo 30757307

And I THOUGHT I had this solved.

But today, I drove the car for ~15 minutes, then hopped back in about 20 min later and started it, only to have it die. It did this twice and popped the CEL. Got it started and drove home, and pulled the codes, and sure enough, its P2097 again.

I'm running out of things to replace here....I haven't replaced the Evap Vapor Canister Purge Valve....but what else is there?Volvo EVAP Vapor Canister Purge Valve - Genuine Volvo 8653908

Thoughts on next steps?

Thanks!

Jonboy

darylrobert · Post by **darylrobert** » 10 Oct 2021, 03:32

sounds like my 740 did, had a faulty MAF connector. but would drive for hours until i try a restart and it would go into limp home mode.

Jonboy74 · Post by **Jonboy74** » 10 Oct 2021, 10:45

I’ve wondered about the MAF.

But I’m not going into limp mode. Once I get it started and get going, I don’t really have an issue.

Jonboy

Post by **vtl** » 12 Oct 2021, 05:18

What's your fuel trims (STFT, LTFT)?

Post by **abscate** » 12 Oct 2021, 06:12

Look at the Short term fuel trim at

800 rpm …….(enter data)

3000 rpm held for 30 seconds ( enter data)

Jonboy74 · Post by **Jonboy74** » 12 Oct 2021, 16:47

Thanks guys!

Ok, here goes...

800 RPM
LTFT Bank 1 -10.59 %
LTFT Lower 0.94
LTFT Upper 1.01
STFT 1.00
O2 Front Bank 1 1.00
O2 Front Bank 2 - No value? is this correct?
O2 Rear Bank 1 0.26V
O2 Rear Bank 2 -0.2V

1480 RPM
LTFT Bank 1 -10.59 %
LTFT Lower 0.94
LTFT Upper 1.01
STFT 0.73
O2 Front Bank 1 0.99
O2 Front Bank 2 - No value? is this correct?
O2 Rear Bank 1 0.69V
O2 Rear Bank 2 -0.2V

3040 RPM
LTFT Bank 1 -10.59 %
LTFT Lower 0.83
LTFT Upper 1.01
STFT 1.01
O2 Front Bank 1 1.01
O2 Front Bank 2 - No value? is this correct?
O2 Rear Bank 1 0.23V
O2 Rear Bank 2 -0.2V

While I was at it, I took some other readings as well, out of curiosity. I was short on time so I probably missed something, but here goes:

640 RPM
EVAP Flow 0.94 kg/h
MAF 14.3 kg/h
Purge Valve Duty Cycle 31.76%

1560 RPM
EVAP Flow 2.59 kg/h
MAF 22 kg/h
Purge Valve Duty Cycle 79.61%

3000 RPM
EVAP Flow 3.25 kg/h
MAF 45 kg/h
Purge Valve Duty Cycle 100%

Thanks!

Jonboy

Post by **abscate** » 13 Oct 2021, 03:48

Ooof, that mid range STFT IS 27%, that’s a huge adjust. Something is leaking or fuel pressure is kaput, have you checked that?

If that is reproducibly rpm depenendent in the mid range, I would look at the intake manifold area for a leak. That’s induction dependent vs a leaky hose

Post by **vtl** » 13 Oct 2021, 05:58

Smoke the intake, you have a huge hole.

Jonboy74 · Post by **Jonboy74** » 13 Oct 2021, 06:09

Thanks guys, I’ll keep digging….how big of a hole do you think I am looking for here?

Quick Question - is there a way to control RPM via VIDA so tht I can do some testing without being in the driver seat?

Jonboy

Post by **vtl** » 13 Oct 2021, 06:19

Pretty significant. The smoke machine reveals tiny cracks responsible for 1% of correction, you have almost 30%. Not unlikely you'll be able to find it by visual inspection.

I think you can't do that in VIDA.