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scionking
scionking, Toyota Expert
Category: Toyota
Satisfied Customers: 469
Experience:  5 YRS EXP. ASE MASTER CERTIFIED/ TOYOTA MASTER CERTIFIED
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I am looking answers regarding a p0402 code on my tacoma...

Customer Question

I am looking for more answers regarding a p0402 code on my tacoma...
http://www.justanswer.com/toyota/69gaz-dpfe-sensor-looks.html
Submitted: 1 year ago.
Category: Toyota
Customer: replied 1 year ago.
I have already verified that the EGR valve is functioning (engine stalls when vacuum is applied to the valve)
Expert:  scionking replied 1 year ago.

Next the switching valve needs to be checked, is this a V6 or 4 cylinder?

Customer: replied 1 year ago.
4 cylinder
Expert:  scionking replied 1 year ago.

Ok below is an image of where vsv for egr is. Also I circled the modulator too, this can sometimes get clogged with soot of debris. you can use a 9v battery to test the VSV, make sure it clicks on and off, you should also check that it seals(If i remember correctly, if not is visa versa) when its off and lets air through it when its on.The top can be removed on the modulator, its got a filter on it and you can remove and check that all ports are clear.

Expert:  scionking replied 1 year ago.

sorry forgot pic

Expert:  scionking replied 1 year ago.

VSV is the most common culprit for this issue

Expert:  scionking replied 1 year ago.

Although the modulator is the easier thing to check. see attached torn diagram on modulator.

Expert:  scionking replied 1 year ago.

Hello, I see you haven't accepted my answer, do you still require assistance with this issue?

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