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Old 04-12-2004, 09:48 AM   #1 (permalink)
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P0401 code said Exhaust Gas Recirculation Flow Insufficent Detected.
P0430 code said Catatyst System Efficiency Below Threshold (Bank 2).
I've replaced the EGR valve which had a lot of carbon on it, but same codes came on. Does this mean I will need a new Catalytic converter?
Can anybody help?
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Old 04-12-2004, 10:02 AM   #2 (permalink)
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DPFE needs to be replaced. That is what controls the EGR valve opening and closing. On the EGR tube from the exhaust manifold, there are two rubber tubes that go to the DPFE. That will help you locate it. Replacing the DPFE should help with the Catalytic code, as well.
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Old 04-12-2004, 10:19 AM   #3 (permalink)
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I think there is a recall on the DPFE. At least there was on my 2000.
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Old 04-12-2004, 10:21 AM   #4 (permalink)
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0401 - DPFE about 60 bucks, easy DIY. 5 min job

then other one i dunno. may be clean the o2 sensor...
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Old 04-12-2004, 11:08 AM   #5 (permalink)
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Ditto on the DPFE replacement. Might not cleat the Catalyst code, but it definitely will clear the EGR code.
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Old 04-12-2004, 01:14 PM   #6 (permalink)
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Before you go replacing stuff and wasting money - Like I did - it may be something a bit more simpler. If you look at your engine bay where the filter box is, follow it up to the "accordian" section and folow that up to the intake. There is a silver section between the tube and the intake. Remove that whole section. On the intake there is a big hole that allows the air in. Below and to the left is a ridge. It should be clear. However, mine was so filled with carbon, I did not notice it was there. After cleaning it out, my problem was solved.

Check that first. These sensors are pretty expensive.
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Old 04-12-2004, 01:54 PM   #7 (permalink)
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Quote:
Originally posted by L0pan@Apr 12 2004, 02:14 PM
Before you go replacing stuff and wasting money - Like I did - it may be something a bit more simpler. If you look at your engine bay where the filter box is, follow it up to the "accordian" section and folow that up to the intake. There is a silver section between the tube and the intake. Remove that whole section. On the intake there is a big hole that allows the air in. Below and to the left is a ridge. It should be clear. However, mine was so filled with carbon, I did not notice it was there. After cleaning it out, my problem was solved.

Check that first. These sensors are pretty expensive.
Yeah, um...

A faulty or dirty MAF (the silver thing along the intake), or a dirty throttle body (the silver thing that is attached to the intake plenum) isn't going to throw a code for insufficient EGR flow. A faulty DPFE sensor, however, will.
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Old 04-13-2004, 06:29 AM   #8 (permalink)
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Thankyou all for your help, the dealer had suggested I have a converter amongst other things with a cost near $2200.
I will try your suggestions first.
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Old 04-13-2004, 11:35 PM   #9 (permalink)
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IF you've got high miles on it, then I'll bet your Cats are going bad.. thus the P0430 DTC. Or, Possibly a downstream O2 Monitor If you're real lucky!
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Old 05-26-2004, 08:07 PM   #10 (permalink)
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I had my DPFE sensor, and EGT solenoid replaced and 3 weeks later my SES light was on again for the catalytic converter, someone said that the DPFE can help when the catalytic code is on so i was wondering if anyone thought maybe the DPFE sensor that they put in could have been faulty?
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