Code 332 - Insufficient EGR Flow

[mekelly]

I started getting a code 332 and 'Check Engine' light on my 1994 XLT with 178,000.

I noticed one of the vacuum hoses going into the DPFE had a hole in it and thought for sure that was the problem.

Replaced the hose and no luck!

Ended up replacing the DPFE with an Airtex/Wells unit and the problem is solved!

So be aware that after 170,000+ miles, those exhaust fumes take their toll on the original DPFE. Note that the Airtex replacement units did away with the diaphram design and use the exhaust gas pressure to signal a solid state device, the exhaust gases never enter the DPFE so it should last a long long time.

 

[larrydd999]

Would you share the part number of the Airtex/Wells unit please? I need to change the one in my '94 Limited.

 

[mekelly]

I ordered the Airtex/Wells DPFE sensor #5s2046 from RockAuto. It was $43.

Solved the problem and I (for once) believe the manufacturer's hype. It is a much much better design than the original.

The truck's running great again.

 

[larrydd999]

Thank you, I'll follow up with that since I'm getting the error code and ended up ordering the wrong sensor (same sensor probably but wrong plug).

 

[mekelly]

Mine has the 'D' connector. It's the one with the orange gasket around the electrical connector.

 

[Centaurious]

I played the "replace me every 2 weeks" game with the plastic ones from O'Reilly's. I finally got a refund and bought the Wells unit from Auto Zone and no problems since.

 

[mekelly]

Good to hear.

I hate to sound like an Airtex/Wells salesperson (because I am not), but their design doesn't allow exhaust gas into the sensor like the original design did.

It's amazing they last as long as they do. I took mine apart (I'll post pictures when I get a chance) and the fact that it had exhaust gas going through those thin plastic diaphragms for 21 years and didn't fail until now is pretty impressive.

 

[mekelly]

Here is the link to the pictures I took of the inside of the DPFE:

https://www.dropbox.com/sh/5ss3hqufljvp39u/AAB5w3V5GAIB2-gcFzXxZ4qPa?dl=0