IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

codes I can't clear Topic is solved

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

michael8888
Posts: 25
Joined: Tue Dec 03, 2013 10:35 pm
Year and Model: v70 t5m 1998
Location: NYC
Has thanked: 0
Been thanked: 3 times
michael8888

codes I can't clear

Post by michael8888 » Tue Oct 01, 2019 1:08 pm

My beloved 98 v70t5 of 12 years had never failed me until a few weeks ago when I had a charging issue. So after some diagnostics I determine the voltage regular was not putting out enough juice. I order a replacement and replaced it however it was faulty and created a parasitic drain on the battery and it caused all type of system faults. I replaced the replacement voltage reg and the battery drain went away, however I still have a lot of codes that won't clear with two different readers and the car is basically running very well.
242 tc control valve (I replaced the controller)
541 Evaporator control valve (I replaced one near gas tank)
CI- 221 vvs signal missing (may be bad sensor at front left wheel)
CI-132 rpm signal missing (tach is working)

I also replace the front O2 sensor which removed the 212 and 521 codes

I removed the front air pump under the battery many years ago so these code don't matter:
445 air pump
616 canister valve
447 control valve air pump

If anyone has an idea what might be causing the 242, 541, 221,132 codes it would appreciated. I know its got to be something stupid.
thx
michael

User avatar
Clemens
Posts: 1191
Joined: Thu Sep 03, 2015 12:34 pm
Year and Model: 96 855 R + 94 855 T5
Location: Austria
Has thanked: 93 times
Been thanked: 54 times
Austria
Clemens

Re: codes I can't clear

Post by Clemens » Tue Oct 01, 2019 3:17 pm

Have you disconnected the battery for an hour or so? I think this should clear most codes. But maybe I'm wrong.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

michael8888
Posts: 25
Joined: Tue Dec 03, 2013 10:35 pm
Year and Model: v70 t5m 1998
Location: NYC
Has thanked: 0
Been thanked: 3 times
michael8888

Re: codes I can't clear

Post by michael8888 » Tue Oct 01, 2019 4:42 pm

yes. didn't work. tried two different scanners one being my autel 808
I have two ecu's and the codes came up on both so the issue has to be a short in the system
I tested for mili-amp draw on the battery add pulled fuses and got no change in load.
might have to test every wire in the harness or keep replacing sensors.
I starting to think the volt reg fried a bunch of sensors and valves.

esl_97_850_T5
Posts: 261
Joined: Tue Jun 19, 2012 10:53 am
Year and Model: 1998 S70 GLT
Location: Chattanooga, TN
Has thanked: 16 times
Been thanked: 17 times
United States of America
esl_97_850_T5

Re: codes I can't clear

Post by esl_97_850_T5 » Tue Oct 22, 2019 2:34 pm

Those CI-xxx codes were probably created temporarily when you had the voltage problems. Those problem situations likely do not exist anymore.

Sometimes the '98 S70/V70 get CI-xxx DTCs that will not go away until both AE01 (DTCs) and AE05 (Historical DTCs) are read before issuing AF01 (Clear DTCs).

To clear those '98 V70 CI-xxx codes, try using either:

a) xiaotec "850 OBD-II" Android app's "Clear DTCs - COMBI" function for 2-3 times -- available on Google Play for US$2, or
b) jonesrh.info's volvo850diag Windows program -- available via https://jonesrh.info/volvo850/volvo850diag.zip download.

Both those softwares work with ELM327 devices, not with cables designed for Vol-FCR use.

Both those programs can use both ECU 51 AE01 (Read COMBI DTCs) and AE05 (Read COMBI Historical DTCs) before issuing ECU 51 AF01 (Clear COMBI DTCs).

Recent Google Play versions of "850 OBD-II" app should automatically read both AE01 and AE05 before issuing AF01 when the app's Clear DTCs - COMBI function is performed. Then perform its Scan function to verify that the CI-xxx COMBI DTCs disappeared.

Most any version of volvo850diag can issue AE01 and AE05 before issuing AF01 by: a) pressing ECU 51 "Full Scan", then b) pressing ECU 51 "Clear DTCs". You can then verify if the COMBI DTCs disappeared by c) pressing ECU 51 "Full Scan", and d) getting the interpretation of all the volvo850diag / ELM327 mumbo-jumbo using the https://jonesrh.info/kwpd3b0_interpreter.html.
1998 Volvo S70 GLT - 205.5K miles - S70 & M44 testbed in 2016-2019; traded 2019-07-15 (for spare time)
1997 Volvo 854 T5 - 147K miles - 850 testbed in 2012-2017; junked 2017-09

User avatar
matthew1
Site Admin
Posts: 10535
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 574 times
Been thanked: 225 times
United States of America
matthew1

Re: codes I can't clear

Post by matthew1 » Fri Dec 20, 2019 1:07 pm

michael8888 wrote:
Tue Oct 01, 2019 1:08 pm
My beloved 98 v70t5 of 12 years ...
Did the post right above this post work?
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

michael8888
Posts: 25
Joined: Tue Dec 03, 2013 10:35 pm
Year and Model: v70 t5m 1998
Location: NYC
Has thanked: 0
Been thanked: 3 times
michael8888

Re: codes I can't clear  Topic is solved

Post by michael8888 » Mon Jan 20, 2020 7:57 am

I finally got rid of all the codes. After slowly testing every sensor with my volt meter I noticed the cam sensor was a little off. I noticed the bosch OEM cam sensor's wire clip was cracking and seemed to be grounding out. I temporarily repaired it and made sure there were no other wires in that area grounding to the each other or the engine block. I also cleaned every connection and put dielectric grease on every connection I separated for testing. I cleared my codes again however the check engine light stayed on. After 2 days and a little driving it went off when I start the car in the morning and has not returned for 3 months and it passed inspection. I'm slowly replacing all the sensors since most are the oem and with 22 years and 200000 miles on them so they owe me nothing. thanks for everyone's input on the site.
These users thanked the author michael8888 for the post (total 2):
matthew1erikv11

Post Reply
  • Similar Topics
    Replies
    Views
    Last post