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I get a P0405 error code, I replaced the EGR vavle and it's still there, what else can cause it?

Tiny
GERARD HOFFMAN
  • MEMBER
  • 2006 CHRYSLER TOWN AND COUNTRY
  • 50,000 MILES
I took my van in for an ispection and it the shop said there were 3 fault codes. They all said the EGR valve was bad. The shop wanted almost $300 to fix it, I am a mechanic in the Army so I was not going to pay them for labor I could do on my own. So I bought the EGR valve and replaced it. And now the only fault that comes up is the P0405 fault, that say there is a low sensor, what can that be?
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Friday, November 25th, 2011 AT 8:10 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,931 POSTS
The code indicates there's an electrical problem with the sensor that monitors the EGR valve operation. Moisture gets inside and causes damage. For the last one I replaced, we could not buy the sensor separately. It came with the new EGR valve. That was on a '90 model. You may be able to buy yours without the valve but electrical tests should be done first to rule out wiring problems.
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Friday, November 25th, 2011 AT 8:28 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,443 POSTS
Hey GERARD,

Did you clear the codes after replacing the valve?

Here is a guide to help

https://www.2carpros.com/articles/check-engine-light-clear-codes

Please let us know happens so it will help others.

Best, Ken

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Saturday, December 31st, 2016 AT 3:05 PM

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