2006 HHR LT 2.2L - Manual - Cat Converter ?
07-20-2022, 04:02 PM
#23
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Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 25,100
If you aren't going to look for and fix the cause of failure it wouldn't be very smart to spend a lot of money on a part that will surely fail.
What brand O2 sensor was installed?
One thing that could be done is to have an old fashioned emissions gas test done to see if there is really a problem (the kind with a probe up the tail pipe).
What brand O2 sensor was installed?
One thing that could be done is to have an old fashioned emissions gas test done to see if there is really a problem (the kind with a probe up the tail pipe).
07-20-2022, 04:53 PM
#24
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Join Date: 07-20-2022
Location: Florida
Posts: 13
I believe they were Bosch from Autozone…I guess when I pull the old one off I’ll see if there’s any damage. I’ve had the F/I cleaned all new plugs, new ignition box done already…coolant is new and the oil…code just randomly popped up..I’m going to change out the upper 02 sensor when I do the Cat.
07-20-2022, 05:02 PM
#26
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Join Date: 12-05-2014
Location: Northern Ohio
Posts: 2,472
If you aren't going to look for and fix the cause of failure it wouldn't be very smart to spend a lot of money on a part that will surely fail.
What brand O2 sensor was installed?
One thing that could be done is to have an old fashioned emissions gas test done to see if there is really a problem (the kind with a probe up the tail pipe).
What brand O2 sensor was installed?
One thing that could be done is to have an old fashioned emissions gas test done to see if there is really a problem (the kind with a probe up the tail pipe).
How long was the P0420 set? (Time and miles. Wild guess is fine.) Do you take a lot of short trips?
Any other codes, now or before the the P0420? Any other issue before or concurrent to this one?
Which O2 sensor? (I don’t even know if there are two on this car.) And what maker and part number?
(Assuming not P04020 but P0420 Catalyst System Low Efficiency.)
07-20-2022, 07:34 PM
#27
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Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 25,100
There is a recall involving the programming TSB # 05-06-04-073 for the 2.2L giving false P0420. If the VIN is lower than 6S559494 it needs updated ECM firmware.
I was afraid you would say Bosch, they are a problem.
Here is a pdf of the TSB:
TSB05-0604-073.pdf
I was afraid you would say Bosch, they are a problem.
Here is a pdf of the TSB:
TSB05-0604-073.pdf
Last edited by donbrew; 07-20-2022 at 08:48 PM.
