fault code reader results

[nathT5]

i got one of these DIY code readers with my car and ive just found a link to show me how to do it,

its showing 4 faults,
1-2-1 mass airflow sensor (AFM?)
5-3-5 TC control valve signal (whats this?)
1-4-3 knock sensor
4-3-3 no rear knock sensor signal (whats this mean?)

car runs ok but the lambda light has been on a few times,
also ive tried to wipe the codes using the same link but it wont work,

can anyone tell me what these faults are to make sense of this?

[nathT5]

just had a thought, ive had the MAS on the airbox unpluged a few times,
would this save and show up as a fault?

[BruceT]

What code reader you got?

[stainesy]

dont all 850,s come with a built in code reader? mine did

[BruceT]

dont all 850,s come with a built in code reader? mine did

Only 93-96 ones.

Some 96's come with OBDII under the coin holder and done have the pin in a hole socket tester thingy me bob.

[nathT5]

mines got an OBD11,
the DIY code reader is just a board with a switch, an LED and clicker and 3 wires,
these plug in pin 3, 5 and 16 of the OBD port.

[t5 pete]

hi nath yes unplugging the air flow meter while the ingnition is on or engine running will bring the lambda light on also i can take a while for it to go off

[nathT5]

hi nath yes unplugging the air flow meter while the ingnition is on or engine running will bring the lambda light on also i can take a while for it to go off

dont think ive unplugged it with the ignition on though...

[t5 pete]

the only other thing is then is if it wernt pluged in correctly or you could just have a prob with the afm also i would say that the TC controll valve is the traction controll at the knock sensor it say to test for shorted or open sensor circit

[t5 pete]

just had a look on the mitchell and it looks like the tc control vavle is the turbo control valve and is situated betwwen turbo and left rear of engine also the knock sensor is located on lower front of engine

[PNuT]

the Turbo control valve is the boost control solinoid AKA BCS

you have two knock sensors behind the inlet manifold..... according to my laptop codes you are missing signals from both the front & rear sensor!

& a maf code

now, the problem is knowing if they are old codes or you actually have a persistent problem with the items!

i would be very suprised if the car is at its full potential with those codes logged

[PNuT]

http://www.vpcuk.org/forums/showthread.php?t=17673

it answers alot of the questions here! i would be extremely cautious if i were you before you melt your engine.....

[Jod T5]

also ive tried to wipe the codes using the same link but it wont work,

First thing to do is to try to perfect the art of code deleting, then see what codes return....
Im not sure what information you have but the attached is sure to work if applied correctly
EDIT i cannot upload the file as it is too big however if you email me at jod.jod@talk21.com i can send it to you.....

Cheers
Jod

[nathT5]

http://www.vpcuk.org/forums/showthread.php?t=17673

it answers alot of the questions here! i would be extremely cautious if i were you before you melt your engine.....

its running great though now.

[nathT5]

First thing to do is to try to perfect the art of code deleting, then see what codes return....
Im not sure what information you have but the attached is sure to work if applied correctly
EDIT i cannot upload the file as it is too big however if you email me at jod.jod@talk21.com i can send it to you.....

Cheers
Jod

this is what ive been using,
http://www.volvoforums.org.uk/showthread.php?t=42315

[Jod T5]

this is what ive been using,
http://www.volvoforums.org.uk/showthread.php?t=42315

Have you built a box or are you using some loose wires...
The art is when deleting the codes to...
Read the codes...
Hold the button or reinsert earth wire for 5 seconds no more than 6
WAIT
As soon as the light comes back on again press button again or reinset earth, this must be done when the light is lit..The fuel pump will prime to show the codes are deleted....
I have a better explanation which i sell with the boxes i make but as i say it will only go by email, tho im sure Stus T5 posted it either here or on T5D5...
cheers
jod

[nathT5]

Have you built a box or are you using some loose wires...
The art is when deleting the codes to...
Read the codes...
Hold the button or reinsert earth wire for 5 seconds no more than 6
WAIT
As soon as the light comes back on again press button again or reinset earth, this must be done when the light is lit..The fuel pump will prime to show the codes are deleted....
I have a better explanation which i sell with the boxes i make but as i say it will only go by email, tho im sure Stus T5 posted it either here or on T5D5...
cheers
jod

its a homemade box with a switch,
do you read ALL the codes then delete them or do them all seperately?
and how long are you supposed to wait after pressing for 5 seconds?
the lights not coming back on atall,

[irf]

I have a better explanation which i sell with the boxes i make

well worth the tenner or whatever it was. only got to use it last saturday, was a breeze to use.

[Jod T5]

its a homemade box with a switch,
do you read ALL the codes then delete them or do them all seperately?
and how long are you supposed to wait after pressing for 5 seconds?
the lights not coming back on atall,

Hi Nath..,
Connect the box and press the button once, all the codes will be read, there may be one, two or three etc....
When all the codes are read the light will stop flashing...
Press the light for 5 seconds
WAIT
Then the light will illuminate...
As it is illuminated press the button again for five seconds.....
I will take several tries to get it right.....
If the light does not come on after within 2 seconds after the first 5 second push you are not pressing it long enough, increase to 6 seconds....
Cheers
Jod

[Jod T5]

well worth the tenner or whatever it was. only got to use it last saturday, was a breeze to use.

Its £15 now Smirf, with a fiver going to the Maddie campaign...
Cheers
Jod