I Recently had a major failure of a trans cooler line which in addition to creating a lot of smoke against the exhaust also soaked the underside of the engine. I fixed the lines and trans is fine.

a few days later the CEL comes on with code 221. I checked the O2 sensor output to ground and am not getting an voltage cycling, just ~0.6V steady. Creating a vacuum leak or sucking propane into the intake can not change the 02 reading.

Is it reasonable that a 10-15 minute spray of hot ATF could have disabled the 02 sensor? I Seem to recall that is needs an outside aire reference to function.

There is a distinct change in exhaust odor with this CEL code. I;ve also checked the Fuel regulator and check fot leaks.

Thanks,
Matt

yes, quite possible your o2 sensor has failed...... in fact likely.

whether the atf did it or not who knows? i ran through a deep ice water pot hole/puddle in mid winter a few years back and my o2 sensor died within 15 minutes.

coincidence or something more?

it still had to be changed.

Happened to me as a result of a tailshaft bushing failure. On that car the sensor, located at the end of the head pipe, was directly in the path of the ATF being slung. 0.6V is where the voltage on that wire is set by the ECU, so either the sensor itself is open circuit, or the heater has failed.
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Art Benstein near Baltimore

The quickest way to double your money is to fold it in half and put it back in your pocket.

I've spliced in a universal Bosch sensor using the heat shrinkable butt splices.

I'll let everyone know tomorrow after my 50 mile round trip commute.

My trans cooler lines are really frankenstein now. I spliced in brake line a few years ago at the bell housing clamp and now pin holes developed right where the line bends around the exhaust downpipe. No kidding the pinhole leake was spraying directly on the exhaust heat shield. I was throwing some smoke for sure!

What is best long term fix for cooler lines? I have bender but not flaring tools?
IS trans cooler line OK long term if routed properly? Thats the current temporary fix.

"What is best long term fix for cooler lines? I have bender but not flaring tools?"

A flaring tool is cheap.

You can also cut out the bad part and use compression fittings to attach the new section.
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1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.

Several of the nation chain AP stores will 'loan' you one.

Hi Matt,

Check the price at your local Volvo dealer. I can just imagine how they'd get one of these in a carton and ship it. :)

However, if you decide you want to roll your own, the material is 5/16" Bundyweld. Flaring it is learned with practice and a high quality flaring tool, not the sort you find at Sears.







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Art Benstein near Baltimore

Deja Moo: The feeling that you've heard this bull before.