Question about 2005 Subaru Outback

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Engine light came on. The dealership said it was diagnostic code P0420 and that it would cost @ $1,200.00 to repair. This seem pretty high. What is this diagnostic code about and is the repair rate

My check engine light came on on my 2005 Subaru Outback and the dealership ran a diagnostic on it and said the diagnostic code was P0420. They said it would cost @ $1,200.00 to make the repair. This seem like an awful lot. What is this diagnostic code and do you think the repair amount is within normal bounds?

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Hi, this code represents a Catalyst System Efficiency Below Threshold (Bank 1). and the repair, considering that it will be repaired by the dealership, seems to be in the normal cost range. The labor is what usually inflates the price when dealing with catalytic replacements.

You could probably get a better deal by taking it to a non dealership type of repair shop. This may cut at least 200 dollars of the original dealership quote.

Please rate and god bless:)

Posted on Apr 14, 2009

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Maybe it is just the front O2 sensor which is a $170 part. This below taken from the repair manual: I am thinking that the Subaru dealer wants to replace everything just to CYA. I know on mine it was the O2 sensor.

AU:DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK
1)
1. OUTLINE OF DIAGNOSIS
Detect the deterioration of catalyst function.
Though the front oxygen sensor output would change slowly with a new catalyst, the sensor output with a deteriorated
catalyst becomes high and the inversion time is shortened. For this reason, the catalyst diagnosis
is carried out by monitoring the front oxygen sensor output and comparing it with the front A/F sensor output.

Posted on May 03, 2009

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TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
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http://www-odi.nhtsa.dot.gov/cars/problems/tsb/results.cfm?start=1&SearchType=DrillDown&type=VEHICLE&year=2005&make=CHEVROLET&model=COBALT&vehtype=PC&typenum=1&component_id=0&summary=true

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