80-Series CEL. I’m stumped (1 Viewer)

[IWANTA80]

1996, 188k miles. Stock motor, exhaust. I’ve replaced the VSV, EGR and that other part (can’t remember the name). CEL still on. Indicates P401 code I believe which is an EGR related code. Then replaced the EGR temp sensor as the mechanic said he was getting erratic readings. CEL still on. I don’t want to keep throwing parts at it but want it fixed. Any hunches on what we should also check?

 

[LC4LIFE]

That horse has been beat to death around here....do some searching and read until you're blue in the face. Very often, its a plugged port through the intake manifold.

You can start here too - EGR Temp Sensor Test Plug

 

[Tools R Us]

A 4.7K ohm resister across the temp sensor connector solves that code.

 

[Rifleman]

Here's a link to a thread that's 9 pages long that has lots of photos that should help you if you decide not to do the simple, and very cost effective solution that Tools R Us suggested to you above.

P0401 Defeated - with pics

I started to throw a dreaded P0401 code that was constant, and recurring immediately after clearing. I have the FSM, and read God knows how many EGR and P0401 threads - More than enough burn my eyeballs and confuse the hell out of me, so I decided to dive in. Preparation - I had decided to...

forum.ih8mud.com

 

[IWANTA80]

So is the code just that? A code that doesn’t cause any issue on how the car performs? If so a small piece of electrical tape across the dash is next.

 

[Tedward]

There is an obvious disadvantage to the tape modification compared to the resistor.