Fault Code 1222: Lambda Control 1. Any idea?

[Chapel]

What does that mean?
I checked this site but it just says 'Lambda Control 1' as an explanation.

[DaN]

Lambda is another name for the o2 sensor.
Has your's ever been replaced?
If you have a digital ocilloscope you can monitor voltage and the pattern of the o2 sensor to see if it's switching correctly.
Or if you have a decent digital multimeter you can monitor it that way. Once warmed up it should switch between about 100mv to 900mv. Fairly quickly. If it doesn't replace the sensor.

Thats what I would check, maybe someone else has more info on this particular fault code.

[Bryson]

1222=replace o2 sensor, basically what he said. Is the check engine light only coming on after idling for about 30 secs? If it's on all the time it's time for a replacement

[nando]

considering your recent posts complaining about your bad idle, and now that you have a fault code, replacing your O2 sensor is probably a good idea. Also, the ECU will not be able to reduce the duty cycle of the larger injectors if the O2 sensor isn't working properly, so do that before you swap to the larger ones. you can pick one up on ebay for around $70, which is a pretty good price.

[Chapel]

gonna replace the spark plug wires and the O2 sensor

[Speed25]

Search for some other posts on the O2 sensor. You don't need the $70 one. The Bosch $40 units work perfectly.

[Chapel]

$40 one?
I havent seen any for less than $80

[iXer]

Could anyone confirm the source of the $40 Bosch O2-sensors?
I'm game.

[Chapel]

I know of $40 ONE wire O2 sensors... but we need a 4 wire

[chesster6969]

Their talking about the Mustang 5.0l oxygen sensor. They are the same for the mustangs and the E30, except for the wiring loom is different. You have to splice the wiring from the mustang o2 and the E30 sensor

[Speed25]

That's right. I should have saved the Bosch part number. If you go to Bosch's site, it will tell you that all of their O2 sensors do exactly the same thing. The only differences are in the harnesses. I wasted about an hour one day at an auto parts store and pulled out ALL of their four-wire Bosch sensors. I found the cheapest one (I think it was $37 or so) and spliced the wires to my old connector (at the car side, not the O2 side). Splicing is perfectly acceptable since even Bosch produces a universal kit where you re-use your old harness.

If memory serves me correctly, you can even use a three-wire if you want since the four-wires have two grounds (?). I believe I found that somewhere while researching the universal kits. Either way, it's REALLY easy, cheap, and works perfectly.