Problem on the 'limp' home yesterday.

[Supercharged111]

And let's not forget that a misfire can clog a cat if it goes too long, so again the misfire is the FIRST thing to be addressed here.

 

[Lou Merrell]

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Here's the drive home this morning:

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Notice the bank 2 sensor numbers.
Start with sensor #1??

 

[Supercharged111]

Insufficient activity is a problem. Sounds like the sensor, I'm not sure what else could cause that code aside from the sensor. Standing by to get schooled. . .

 

[Lou Merrell]

I just removed the #1 sensor and cleaned it. Its soaking in electrical cleaner right now so while that's going on I'm going to check the circuit.

 

[PlayingWithTBI]

Its soaking in electrical cleaner right now so while that's going on I'm going to check the circuit.

There's an outside air port in the sensor, if it's plugged the sensor won't work right. FWIU it senses the difference between outside air and exhaust gas to give you the voltage feedback. Make sure that port is clean from sludge and pipe dope, etc.

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[Lou Merrell]

Sensor on bench:
7.2 ohms

KOEO volts .17
Engine running volts .17

 

[Supercharged111]

Sensor on bench:
7.2 ohms

KOEO volts .17
Engine running volts .17

That sensor is reading lean. And the same running or not. Sounds like junk to me.

 

[PlayingWithTBI]

That sensor is reading lean. And the same running or not. Sounds like junk to me.

^^^This or, the wiring is bad but, probably not if you're getting some voltage...

 

[Lou Merrell]

Put new sensor in. Still has a misfire.

 

[Supercharged111]

Put new sensor in. Still has a misfire.

What's the new sensor showing for voltage?