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Code P0420
Francais
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P0016 Audi
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G395
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P0018
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5:02
apemissions.com
What Causes A P0420 Code?
According to a recent EPA study, 7% of America's cars are exceeding emissions standards. Most of those emissions failures were due to P0420 or 430 catalyst system inefficiency below threshold OBD II Code.
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