IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Mulitple Engine Codes pulled...

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Mr. Detail
Posts: 351
Joined: Wed May 03, 2006 11:21 am
Year and Model: 2002 V70 N/A
Location: Newtown Square, Pennsylvania
Has thanked: 13 times
Been thanked: 2 times
United States of America
Mr. Detail

Mulitple Engine Codes pulled...

Post by Mr. Detail » Fri Sep 01, 2017 11:58 am

Hello. Just got my '98 S70 back last night from my trusted mechanic (at least he was trustworthy in the past) and he was supposed to just install for me a new radiator. Instead they broke the thermostat housing along with the job and when I picked it up and turned the key, I see that nice, bright orange "check engine" light illuminated. The engine also idled very funny and I drove it home like this.
Just went out to my local parts store and they pulled the following codes for me:

P0300: Random/Multiple Misfire detected.
P0302: Cylinder 2 misfire detected
P0303: Cylinder 3 misfire detected
P0304: Cylinder 4 misfire detected
P0172: Bank 1 system, too rich.
P0455: Evaporative emission system leak detected

If anyone can suggest my next move, I would greatly appreciate any assistance. Just wrote that trusted mechanic a check for over $600 and I don't have a good feeling about going back.

Thanx!

User avatar
abscate
MVS Moderator
Posts: 19928
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 263 times
Been thanked: 842 times
Trinidad & Tobago
abscate

Re: Mulitple Engine Codes pulled...

Post by abscate » Fri Sep 01, 2017 2:59 pm

Clear all the codes and see what comes back.

Talk to your mechanic while the job is still fresh, so you have a basis for discussion. Mechanics don't break cars willingly, something simple is probably loose or forgotten.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
FLXC90
Posts: 925
Joined: Mon Aug 18, 2014 4:31 pm
Year and Model: 98 V70 T5
Location: Florida Panhandle
Has thanked: 2 times
Been thanked: 12 times
United States of America
FLXC90

Re: Mulitple Engine Codes pulled...

Post by FLXC90 » Fri Sep 01, 2017 5:38 pm

Since the job was radiator, and the thermostat housing, I would look at purge valve hoses on the shroud, and the elbow for the PCV on the manifold near the thermos housing. Also, moderator is right, check while fresh, they may find something they missed or didn't seat well-enough. If they're decent, they'll give it a good looksee and not bill you. (unless they find something unrelated causing it)

edit-something unrelated, how fresh are your tune-up parts? when was PCV done last? Is there oil in your distributor?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

Mr. Detail
Posts: 351
Joined: Wed May 03, 2006 11:21 am
Year and Model: 2002 V70 N/A
Location: Newtown Square, Pennsylvania
Has thanked: 13 times
Been thanked: 2 times
United States of America
Mr. Detail

Re: Mulitple Engine Codes pulled...

Post by Mr. Detail » Sat Sep 02, 2017 4:19 pm

My tune up parts are not fresh at all. I kind of get a kick out of your responses about oil in my distributor. I took the car to my mechanic on Monday night and picked it up on Thursday. So your are stating that oil could be in my distributor after the car was fine when dropped off and after sitting in a shop for three days suddenly has oil?

User avatar
abscate
MVS Moderator
Posts: 19928
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 263 times
Been thanked: 842 times
Trinidad & Tobago
abscate

Re: Mulitple Engine Codes pulled...

Post by abscate » Sat Sep 02, 2017 8:27 pm

Cars degrade slowly over time. people commonly post..." It was running fine then suddenly....."

Well, it wasn't running fine. Plugs cap and rotor are 30,000 mile service items, seals leak, oil gets places it shouldn't and one day it bites you. Unless you paid about $500 in diagnostics to go through your engine management system, your mechanic didn't check any of that stuff.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
erikv11
Posts: 9462
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 80 times
Been thanked: 243 times
United States of America
erikv11

Re: Mulitple Engine Codes pulled...

Post by erikv11 » Sat Sep 02, 2017 9:36 pm

Oil in the distributor is pretty common, it happens from a blown rear cam seal. That was my first thought too - is there oil under the cap?

For example, maybe the mechanic reconnected a PCV hose incorrectly.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

scot850
Posts: 5660
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 9 times
Been thanked: 167 times
Canada
scot850

Re: Mulitple Engine Codes pulled...

Post by scot850 » Sun Sep 03, 2017 9:52 am

Not sure why they managed to break the thermostat housing when changing a radiator, unless they were trying to change the thermostat. The housings can be fragile for the thermostat with age and the 2 bolts that hold it down can become stuck in the threads and cause the housing to crack when removing with too much force. Not an uncommon issue, but a shit happens one.

Not sure why they would have touched the PCV system either in the process. One possible issue is the ECT (engine temp sensor) which is in the thermostat housing. Check they connected it OK and the wiring is good as it becomes brittle with age at the connector which is on the back of the power steering pump. Also check they connected all the connectors on the top of the fan shroud correctly and they are seated.

Have you spoken to the repair shop? What have they said?

The distributor cap/cam seal issue is a possible coincidence, but at this point I am not sure that is the issue, but a fairly easy check. Remove the air filter cover to get room and undo the 3 screws/bolts that hold the cover on and have a quick look.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

User avatar
wizechatmgr
Posts: 1298
Joined: Thu Jan 12, 2017 1:07 pm
Year and Model: 1999 V70 XC AWD 2.4T
Location: Albany, NY area
Has thanked: 22 times
Been thanked: 53 times
Contact:
United States of America
wizechatmgr

Re: Mulitple Engine Codes pulled...

Post by wizechatmgr » Sun Sep 03, 2017 4:55 pm

I'd speak with the shop. It could be any number of things and a good shop won't shy away from giving it another look.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~183k miles

User avatar
FLXC90
Posts: 925
Joined: Mon Aug 18, 2014 4:31 pm
Year and Model: 98 V70 T5
Location: Florida Panhandle
Has thanked: 2 times
Been thanked: 12 times
United States of America
FLXC90

Re: Mulitple Engine Codes pulled...

Post by FLXC90 » Sun Sep 03, 2017 6:47 pm

Exactly where I was going with my comments, oil in the distributor worsens over time. Also it could explain the scattering of misfires It just becomes a matter of enough to start fouling the rotor. The PCV nipple right near the thermostat housing is already a known culprit for leaking, if it was merely bumped it could worsen symptoms miraculously, overnight. As far as the purge valve and hoses, same thing, they took them loose at least to change radiator: known culprit for P0455.

Scot850 makes a good point also, ECT wiring. Does the temp gauge seem to behave normally? If the engine doesn't realize it has warmed up, it will effectively run like the "choke" is on. could cause stumbles and misfires. All simple fixes, all "feces occurs" items for the shop, all agonizingly frustrating for you. I sympathize, I'm (very lazily) chasing P0455 myself. And I just changed out the hoses on my purge valve, they were deteriorated to the point of feeling gooey. Also found a manifold elbow, still have the code on my 235000mi $300 POS70. still fires on the first try every time for three plus years now.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

User avatar
Roger_850T
MVS Moderator
Posts: 262
Joined: Tue Dec 31, 2013 11:55 am
Year and Model: 854T 1995
Location: Frederick MD
Has thanked: 0
Been thanked: 13 times
United States of America
Roger_850T

Re: Mulitple Engine Codes pulled...

Post by Roger_850T » Sun Sep 03, 2017 8:23 pm

Maintenance aside, it does seem suspicious that it started misfiring after this work.

I think the "System too rich" code is a result of all the misfires.

With the Evap code as well as the misfires, I am thinking that a lot of extra air is getting in there. I think an air hose is not on right, not tight, or a vacuum hose off, or something like that.

You don't say if its a turbo or not, but they would have needed to take off the air hoses to the intercooler to replace the radiator. A loose clamp on the intercooler hose could cause the hose to partially come off.

I'd look under there for anything that looks amiss or disconnected and see what I can see.

Hope this helps!

Roger
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...

Post Reply
  • Similar Topics
    Replies
    Views
    Last post