JustAnswer > Chevy

Chevy

Ask a Chevy Question, Get an Answer ASAP!

Have your own Chevy question?

25 Chevy Mechanics are Online Now

characters left:

Not a Chevy Question?

Question

i keep getting a p1406 code. I replaced the egr valve and cleaned the carbon around the area. It also said that it could be a open or short circuit condition. ?????

Submitted: 698 days and 5 hours ago.

Category: Chevy

Value: $9

Status: CLOSED

Optional Information:
1997 Chevrolet 1500 350

Already Tried:
replaced egr valve cleaned carbon around area used chevron textron in the tank the last three fill ups. replaced plugs wires cap and button

Posted by frank 698 days and 5 hours ago.

Info Request

What year model and engine. That code is a voltage of the egr potion sensor out of range-your going to have to have a scanner to check the operation-but check the wiring harness buy the ebcm on the drivers fender for chafing.frank39560.8710217245

698 days and 5 hours ago.

Reply

1997 silverado 5.7 350 1500

Posted by frank 698 days and 5 hours ago.

Answer

Your going to have to use a scanner to check the system-but check the wiring harness for rubbing against the brake modulator mounting bracket on the drivers inner fender.The code is for egr sensor postion feedback.

698 days and 5 hours ago.

Reply

Reply to frank's Post: the wireing harness is still straped in good and there is no chafing. what will the scaner tell me and how could the voltage be off to the egr valve? thanks

Posted by frank 698 days and 5 hours ago.

Answer

You need to see the egr postion sensor voltage and what the desired vs actual voltage is.With the right bidirectional scanner you can command the egr open and close to see if it is working-you can also test the 5 volt reference and sensor return back to the ecm.With out a scanner your shooting in the dark.

698 days and 5 hours ago.

Reply

Reply to frank's Post: if it will not respond will it be a computer issue?

Posted by frank 698 days and 5 hours ago.

Answer

If it does not respond-the control ciruit of the valve needs to be checked first before replacing anymore parts.

698 days and 5 hours ago.

Reply

Reply to frank's Post: would that cause rough idle or sticking idle?

Posted by frank 698 days and 5 hours ago.

Answer

A problem in the egr-idle yes,but sticky throttle?

698 days and 5 hours ago.

Reply

Reply to frank's Post: at idle in drive(like you are driving around a parking lot without giving it gas, it feels like it is idled up to high) i have to pat the acclerator to idle it down

Accepted Answer

Once again you need a scanner-if the tps voltage is off it can do that-but you need to see the parameters and the comands from the computer.

Expert:	frank
Pos. Feedback:	98.9 %
Accepts:	2587
Answered:	4/22/2008

Chevrolet Technician

33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Chevy

Ask a Chevy Question, Get an Answer ASAP!

Have your own Chevy question?

Related Chevy Topics:

Question

i keep getting a p1406 code. I replaced the egr valve and cleaned the carbon around the area. It also said that it could be a open or short circuit condition. ?????

Optional Information

Optional Information: 1997 Chevrolet 1500 350Already Tried: replaced egr valve cleaned carbon around area used chevron textron in the tank the last three fill ups. replaced plugs wires cap and button

Info Request

What year model and engine. That code is a voltage of the egr potion sensor out of range-your going to have to have a scanner to check the operation-but check the wiring harness buy the ebcm on the drivers fender for chafing.frank39560.8710217245

Reply

1997 silverado 5.7 350 1500

Answer

Your going to have to use a scanner to check the system-but check the wiring harness for rubbing against the brake modulator mounting bracket on the drivers inner fender.The code is for egr sensor postion feedback.

Reply

Reply to frank's Post: the wireing harness is still straped in good and there is no chafing. what will the scaner tell me and how could the voltage be off to the egr valve? thanks

Answer

Reply

Reply to frank's Post: if it will not respond will it be a computer issue?

Answer

If it does not respond-the control ciruit of the valve needs to be checked first before replacing anymore parts.

Reply

Reply to frank's Post: would that cause rough idle or sticking idle?

Answer

A problem in the egr-idle yes,but sticky throttle?

Reply

Reply to frank's Post: at idle in drive(like you are driving around a parking lot without giving it gas, it feels like it is idled up to high) i have to pat the acclerator to idle it down

Accepted Answer

Once again you need a scanner-if the tps voltage is off it can do that-but you need to see the parameters and the comands from the computer.

Related Chevy Questions

Optional Information:
1997 Chevrolet 1500 350

Already Tried:
replaced egr valve cleaned carbon around area used chevron textron in the tank the last three fill ups. replaced plugs wires cap and button