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What is your question?
p0420 Cat Efficiency below threshold, p1706 manufacturer specific code, and p1456 manufacturer specific code are all in. Approximately how expensive are these problems? Thanks
1 Reply
Cat inefficientcy may just be you needing new O2 sensors. Evap leak is the 1456 code and may be form a bad gas cap. More time is needed to run some tests.
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