In this video it will show you how to read and reset the error codes using the on board diagnostic tool under the hood of the Volvo 850 cars built in 1993, 1994 and 1995 model years. Many codes in this system do NOT set off the CEL (Check Engine Light).
Port Choices
A1 Transmission
B1 Climate Control
A2 Fuel System
B2 Cruise Control
A3 ABS
B5 SRS
A5 TCU (Transmission Control)
B6 Power Seat
A6 Ignition System
A7 Combined Instrument
Link for code information: http://www.matthewsvolvosite.com/read-codes-volvo-850
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Hi Robert I have a Volvo 95 850 the on board DTC Red light come on but don't blink check engine light is on I guess it no functioning properly I plugged on 2 press light come on but don't blink ..? what's wrongs?
I noticed you moved the pin from A2 to A3 during the mid last part but than at the end you’re back at A2…. What’s that about ?
Great Video. Did you see this one?
Volvo Automobile Error Codes
https://www.youtube.com/watch?v=NRmV0p8_16o
Hi Robert. I am in dire need of a new obd1 diagnostic unit A box. I purchased my 1994 manual 850 NA amd the wire was missing from the unit A box and can't find one anywhere online. Please let me know if you have one or can get one I can pay asap I am in Canada. Thank you
Hello, please can you tell me how i can read codes on a 850 2.5 TDI from 1996 ? my OBD2 scan tool does not work on this car…. thank you in advance
If I have some trouble with my 850 94 model, I always know where I can find answers <3
Thanks for all your great videos Robert. Could not have serviced my 850 turbo wagon without them! Thanks again and keep it up.
Hey Robert, thanks for the great video. I have used it to pull codes off my 1995 850 OBD-1 in the past. Right now when I use this technique I can only get codes from A7. when I plug into the other ports and hold the button for the same amount of time, it doesn't flash any code. No flashes at all for anything but A7, and I'm not able to reset the codes. On some of the other spots it dimly shows the red light when I plug it in, but on others, no light at all. I wondering if I need to replace anything in the plug system? Any thoughts for when it flashes for one but won't flash anything for the others? I'm pretty sure it has codes stuck in some other places that I've gotten codes in the past (like A3), and that's stopping me from resetting.
I have 740 92" and When I'm trying to read error codes my obd don't blink any advice?
Well, I am confused! I own a 1995 850 but there is no OBD port under my hood. From the OBD2 port (inside) I can't get any information for some reason.
By far the most helpful person on youtube for car issues. Having gone from volkswagon to jeep to now volvo these videos are the most clear cut and easy to follow i have ever seen
Robert, if I'm correct that this applies to the 960 as well, what I just discovered trying to check transmission codes on my 1993 960 (OBD1) is that instructions I find online say to plug the test lead into hole #1 to run this test. Problem is: when I check the OBD unit, hole #1 has no wires going to it. The harness that feeds the OBD unit A (there are two) only has wires going to 4 of the 8 holes, by design. And hole #1 is not one of them. Your thoughts? Thank you!
Hi, thank you for The information. It really helped me out with my problem. Tack. (swedish).
Hi Robert, another great video. You are a wealth of information! Thank you so much for sharing it! I'm a single mom of a United States Marine and have limited income. Recently having problems with my ABS brakes engaging on their own while driving at about 25 miles per hour. Any suggestions? The wheel speed sensors were recalled years ago & the dealer replaced them for me. The car has just over 170,000 miles, but I would like to keep it running. Can you please give me suggestions. Is it the ABS module or wheel speed sensors that are bad, need cleaning, all or only bad one need to be replaced? Thank you in advance for your help.
What a fantastic video, so much valuable information! If you only knew how few mechanics know this about our old Volvos… I have a Volvo '92 960 😉
I do have one question – It looks like that between you reading your error codes, and you resetting your codes, you had moved the jumper cable from port 2 to port 3 – is that correct? And why?
Hey robert, I have a 850 with a fresh replaced battery and wires. I run thru the codes and its all codes for sensors.. after reseting the check light goes away, but when restarting the computer thru ignition key the light comes back. Im fairly certain my sensors are all good.. any fixes? Thx
Thanks a lot for yours videos!!!
Do you know, for what is this green wire with red band wich stay infront on OBD1 box?
Thanks in advance!
hey robert im having trouble. my red light is automatically on and the button doesnt do anything when i turn my key. what does this mean? its in a1. im checking for a flashing orange arrow problem. it seems the car shifts fine it just has that arrow when i go to drive
Hi Robert…when i put the cable on nº3 and start the ignition on, the light turns on right a away and stays there! Doesn´t let me do nothing!!
Hi, my A3 ABS port has thrown up 122, 141, 142, 211, 311 and 322??????
I noticed you started working with A2 port (fuel system airs) and then without any reason, you changed to A3 port (ABS) and then reset the port. Can you explain that? Why you changed the port? If we get the "check engine" message how we know what port we need to start working with? Do we need to buy a special tool? and if this is the case what's the name of it? Thank you in advance for your answer.
Hi Robert. I did this with my 93 and all went well except for the A3, no light came on at all, ant that’s the main one I was hoping for since my abs light is on, any suggestions?
What should i do if it’s not reading any codes?