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FIX FOR P0031 P0051 P0037 P0057 P0430

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Old 04-07-2011, 07:35 PM   #1
toytaco1 [OP] toytaco1 is offline
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Thumbs up FIX FOR P0031 P0051 P0037 P0057 P0430

Thanks to TW I was able to fix these codes, if you have these codes come up at the same time and your truck isnt running right chances are your air fuel relay is bad and needs to be swapped out cost is 25 bucks
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Old 04-08-2011, 12:22 AM   #3
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p0430

Since i got my Doug Thorley shorty headers installed i got the p0430 code.
Howd you fix your p0430?ive already had disconnected my battery overnight and tightened the gas cap. ive had 2 different mechanics look for an air leak,there isnt an air leak. My tacoma has 84,780 miles,so i hope its not the cat. Any suggestions would help! Thanks in advance
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Old 04-08-2011, 05:18 AM   #4
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Quote:
Originally Posted by toytaco1 View Post
Thanks to TW I was able to fix these codes, if you have these codes come up at the same time and your truck isnt running right chances are your air fuel relay is bad and needs to be swapped out cost is 25 bucks
Where IS the air fuel relay?
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Old 04-08-2011, 07:00 AM   #5
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Quote:
Originally Posted by PSU Taco85 View Post
I think you are talking about the A/F heater relay. This heats up the O2 sensors before the engine/exhaust is warm to get a more accurate reading.

Read up: http://www.lovehorsepower.com/ToyotaPDFs/37.PDF

The A/F heater relay is in the fuse box in the engine compartment.

See page 24:
http://www.ncttora.com/fsm/05+/data/...f/em01d0up.pdf
Thanks! now I can file this one away for future reference....
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Old 04-08-2011, 12:02 PM   #6
toytaco1 [OP] toytaco1 is offline
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Yeah a quick test is to pull your fog relay and switch it with your air fuel heater relay because they are the same, if it works great if not check the sensor in front of the cats or check for a leak. When did it throw the code? how many miles after you installed your headers?
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Old 04-08-2011, 02:40 PM   #7
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Quote:
Originally Posted by toytaco1 View Post
Yeah a quick test is to pull your fog relay and switch it with your air fuel heater relay because they are the same, if it works great if not check the sensor in front of the cats or check for a leak. When did it throw the code? how many miles after you installed your headers?
less than 150mi
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Old 10-16-2014, 08:51 PM   #8
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where are u Matt?
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Old 10-17-2014, 03:35 PM   #9
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Yesterday my truck threw 5 codes:

P0031
P0037
P0051
P0057
P0102

Swapped out the fog relay with the A/F heater rely and all codes cleared.

Thanks OP for this thread!! +1 rep to you my friend
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