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Showing results for tags 'p0420'.
Found 5 results
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Installed an L-shaped spacer (3 x 3 inches) at the second O2 sensor on a 2000 Forester, to lay to rest the P0420 code that has been coming on weekly for the last five years! Now I'm getting a P0136 code. My understanding was that the O2 sensor distal to the cat served no critical purpose, other than... -
Need some advice, I have a Subaru Outback 2000 with over 250,xxx Miles. Codes: P0420 and P0303 When I initially ran the reader it said the O2 sensors were bad, both front and back. I replaced those hoping it would eliminate the 420 code also but it has not. Though, the O2 sensor codes did go a... -
I have a 2005 outback llbean 3.0 with 146,000 miles. Today the check engine light came on with a blinking cruise control light. Had the code pulled at Advance which said P0420 Catalyst system efficiency below threshold What is the fix? O2 sensors? up or down stream is there a way to determin... -
OK a little late on maintenance at 135K miles, I decided to check out the fuel filter. Turns out the only fuel filter is a "sock" inside the gas tank and according to SOA tech "we never change them". Anyone change/examine yours? While on the subject, this week I will be visiting a mechanic to tra... -
Okay so here is my question, I have a 2001 Lego 5 speed with 125,xxx miles on her, and Is there any difference between O2 sensors for the automatic and manual? On Subaru Parts For You it lists that there are two different O2 sensors as seen here: http://subarupartsforyou.com/cp_partlistby...