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  1. R

    Check engine light and O2 sensors

    guys, I took my jeep to a 3rd mechanic, he read the codes and he's suggested replacing all 4 O2 sensors and the 2 catalytic converters. $950. The 1st mechanic I took it too, thought the problem would be a bad PCM. He's suggested I take it to a different mechanic shop that was better at...
  2. R

    Check engine light and O2 sensors

    thanks
  3. R

    Check engine light and O2 sensors

    i'm not a mechanic unfortunately:( Is this something I can do myself or do I need to take to the shop? If so, any idea what this work should cost? Thanks
  4. R

    Check engine light and O2 sensors

    got it. Codes.. P0421 P0031 P0037 P0051 P0057
  5. R

    Check engine light and O2 sensors

    got it. Codes.. P0421 P0031 P0037 P0051 P0057
  6. R

    Check engine light and O2 sensors

    I own a 2005 Jeep Wrangler Unlimited LJ with 100k miles. The jeep runs great, but the check engine light has been on for several years now. The mechanic says that his computer codes are showing that all the o2 sensors are bad. However, he doesn't think that is the case. He thinks it's probably...
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