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Toyota tacoma 2010 p0138

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New User

Mar 25, 2015, 4:34 PM

Post #1 of 2 (2078 views)
Toyota tacoma 2010 p0138 Sign In

Hello guys, I have a 2010 toyota tacoma Sr5 with the 2.7L 4x4. I have 60000 miles on it.

About a year ago i started to get the p0136 code. After a few time resetting the DLC with no success to clear the codes for good( the codes kept on coming back after 60 to 150 miles ).
Not long after that i got both the p0136 and the p0138 codes, and for about 6 months i only have the p0138 codes.

I replaced my rear oxygen sensor with a brand new Ntk oxygen sensor but that did not the trick. I also tried some spark plug non foolers without any success either.

I have the software Scan xl the read the Obd2 data. Here is the freeze frame data from my last DTC p0138 code.

Ultimate Carjunky / Moderator
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Mar 25, 2015, 6:12 PM

Post #2 of 2 (2066 views)
Re: Toyota tacoma 2010 p0138 Sign In

Freeze frame data is great, but you need to monitor the Bank 1 sensor 2 voltage. According to the freeze frame at the time the code set the voltage was around .80 volts, but that is only one frame of data. Not much help. You need to monitor a live data stream and see what the rear sensor voltage is doing.

If the rear sensor is hanging at high voltage, create a big vacuum leak and see if the sensor goes low. Let us know what you find out. Also take note of the AF sensor voltage when you create the big vacuum leak. The A/F voltage should go higher than 3.3 volts.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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