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Internal Lambda 1 stuck at 0


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Your log shows "R Comp invalid".  This means the ecu isnt seeing the correct calibration resistance at the sensor.

Can you try this same test that I have suggested at the end of this post:

 

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So are you saying there is no longer error 36, but you have 16 instead?  

Typically error 16 is lack of adequate current on the 12V wire.  Maybe try a new temporary 12V wire to see if that changes anything.

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Yup, so I had purchased 2 afr sensors. I replaced the one that had the Rcomp error with my spare. The spare is now reporting error 16. 

Do you have an idea of how much current that's required? I have the 12v sourced from the same switched ignition that powers the ECU.

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5 hours ago, chickeneatman said:

Do you have an idea of how much current that's required?

I believe under some conditions they can pull as much as 8A for a very short time, but typically <2A.  Just try a temporary new 12V wire with a jumper lead or similar, as it would be pretty unusual to have two bad sensors unless they are fakes.

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Wired directly to the positive on my battery still had error code 16. Interestingly the temp seemed to slowly count down...?

I know it is wired correctly...

They shouldn't be fakes. They came in Bosch boxes with all the Bosch part numbers printed on the boxes. Look real to me...

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Try putting the codes in this checker https://protect.bosch.com//

Not sure how accurate that site is as mine is not coming up and it was bought from a link dealer. This is the 7th i have bought for various projects and not had an issue with any. 

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My boxes don't have a QR code, and the more I compare them to the o2 sensors on the Bosch website the more differences I spot... Like the insulation on the sensor wires is a silicon fiberglass type, whereas the Bosch units look to have a more plastic sheathing.


I just ordered one verified to be a Bosch unit from a local parts store. I will be able to try that in a few days.

 

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