YotaTech Forums - what ecu code is this?

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- - what ecu code is this? (https://www.yotatech.com/forums/f116/what-ecu-code-253976/)

JTonJuice

May 23, 2012 06:44 PM

what ecu code is this?

25?
and
21?
help please
http://youtu.be/hnfJ_cVjDjk

justin_4runner

May 23, 2012 08:52 PM

it looks like a 21 and 52 to me...

JTonJuice

May 24, 2012 01:48 PM

anyone else?

Lycanistic

May 24, 2012 01:56 PM

It is 21&52, glad you added a video. 21 is a O2 sensor, and 52 is the knock sensor.

BMcEL

May 24, 2012 02:22 PM

Hint...count the blinks. :great:

JTonJuice

May 27, 2012 06:44 PM

thanks guys.. so need to change knock sensor? truck is runnning fine

TNRabbit

May 27, 2012 07:49 PM

The knock sensor is USUALLY cause by the pigtail that runs from the wiring harness connection under the intake manifold to the knock sensor. The sensors themselves are seldom faulty (but it can happen).

O2 sensor change should net you significant (2-4 mpg) fuel economy increase.

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