Code 327
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Tuned
Joined: Jan 2013
Posts: 305
Likes: 7
From: Middleburg, FL
Code 327
Check engine light comes on randomly and usually last about 3 - 5 seconds and then goes off. May stay off for several minutes but eventually does it again. Bought a reader and found code 327. I see that it is EGR related. I've only had the truck 2 months and see that it has a new EGR unit installed and was done at a shop a couple of months ago according to the service records that came with the truck. I've looked at the green vacuum line and it appears to be in good shape. What can I do to find what's causing the code?
Fleet Mechanic
Joined: Mar 2014
Posts: 1,926
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From: Saskatchewan Canada
When a code is set, it can point directly to a faulty component, or it can be indicating that something is pushing the suspect component outside it's normal operating range. In the case of an EGR valve, the problem could be in the electrical connections or it could be deteriorated plumbing. Check all the related hoses. make sure you have an EVTM on hand for reference.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Electrical and Vacuum Troubleshooting Manual
Code 327 indicates the closed EGR feedback signal is too low. You never indicated if the Code was displayed in the KOEO tests, CM display or KOER. If it is from CM (Continuous Memory) that means it has happened in the past. Try clearing the codes then drive the truck again to see if it returns.
If it does return then get a meter to measure the EGR position signal from the EGR Valve Position (EVP) sensor (Key On, Engine Off). Should be above 0.2 VDC.
Code 327 indicates the closed EGR feedback signal is too low. You never indicated if the Code was displayed in the KOEO tests, CM display or KOER. If it is from CM (Continuous Memory) that means it has happened in the past. Try clearing the codes then drive the truck again to see if it returns.
If it does return then get a meter to measure the EGR position signal from the EGR Valve Position (EVP) sensor (Key On, Engine Off). Should be above 0.2 VDC.
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Tuned
Joined: Jan 2013
Posts: 305
Likes: 7
From: Middleburg, FL
Code was taken KOEO. I'll clear the code when I get home and see if it returns. Thanks a ton for the help.
Edit: Is the EVP sensor the one the green vac hose connects to at the coil bracket?
Edit: Is the EVP sensor the one the green vac hose connects to at the coil bracket?
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
For reference: Fuel Injection Technical Library » EGR Valve Position sensor (EVP)
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Tuned
Joined: Jan 2013
Posts: 305
Likes: 7
From: Middleburg, FL
Checked the voltage at the EVP sensor and it was good, so I replaced the sensor and all is good now. Happy day and thanks for the help.
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
Glad to see it is resolved.
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