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Recent questions tagged p0420

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I have a Honda 04 Accord. Codes P1009, P0302, P0420. HELP!
asked Oct 31, 2018 by
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1 answer 341 views
What do i need to do to repair this problem?
asked Oct 31, 2018 by
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2 answers 620 views
I have a 2001 Hyundai Sonata with engine codes P0430 and P0420
asked Oct 27, 2018 by
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P1457 HONDA -
asked Oct 23, 2018 by
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1 answer 261 views
P0420 Nissan -
asked Oct 23, 2018 by
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2000 Chevy Blazer V6 4WD P0420
asked Oct 22, 2018 by
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1 answer 320 views
keep getting p0340 and p1283 codes over 6 months now.
asked Oct 20, 2018 by
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1 answer 214 views
My CTS pulled code P0420
asked Oct 19, 2018 by
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1 answer 383 views
the code was P0420. My car is drving fine, but is now guzzling
asked Oct 18, 2018 by
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1 answer 446 views
Po430 Code Ford escape 2001 changed plugs 4 and 6 now misfire help?
asked Oct 17, 2018 by
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1 answer 354 views
P0420 Nissan -
asked Oct 15, 2018 by
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1 answer 464 views
2000 Toyota Corolla codes P0133 P0300 P0420 accelleration hesitation
asked Oct 15, 2018 by
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1 answer 251 views
What codes can show up with the trac off light and i have a po420
asked Oct 12, 2018 by
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1 answer 573 views
P0420 Toyota -
asked Oct 12, 2018 by
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1 answer 407 views
engine code P0420
asked Oct 11, 2018 by
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1 answer 235 views
are 0420 code and 1273 the same
asked Oct 11, 2018 by
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what does po420 engine code mean
asked Oct 10, 2018 by
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