My MR2 and his 6 codes...

[Zero turbo]

Well My MR2 feels like @$$. I have 6 codes

1-Oxygen sensor (code 21)
2-Air Fuel Ratio Lean (25)
3-Air Fuel ratio Rich (26)
4-Status Signal (43)
5-Switch condition Signal (51)
6-Knock Sensor (52)

When my clutch when depress it sound like is mixing sand.
My abs light is on and my right caliper dosen't close.
my boost bounces from 11 psi to 14 psi backand fort
and when boosting it fells like if you where towing something.
So does anyone knows a link to a online toyota part dealer
or has a rough idea on how much will it cost to repair all these
issues thx.

[tHa kNiGHt FaLL]

all 6 are related to the o2 sensor...

but don't just change the o2... you have to find out why it failed... cause its kinda expensive to replace and have happen again because something is causing it...

an o2 sensor switches above and below 450 millivolts minimum around 150mv max to 950 mv... everytime it crosses the 450mv line is considered a cross count or switch count. Which is supposed to happen 3 times a second...

air fuel ratio is directly effected by the o2 sensor...

you need proper tools to test this accurately but there are easier ways that are not as accurate but can still give you the same results...

you have a multimeter...?

and remove the sensor from and check the tip... look for scoring... severe burning...

[Zero turbo]

i dont have a multi meter but thx.... anyways i will take it to the mechanic 1st thing on the morning. Thx for the reply .