P0401

Asked by May 14, 2017 at 06:48 PM about the 2000 Toyota Camry

Question type: Maintenance & Repair

Check engine light on with 107K miles. Auto zone got P0401 code and replaced the EGR vacuum modulator valve.  Light is still on.  Is it best to wait a few dozen miles for light to reboot?  Should I take cable off battery if light stays on?

7 Answers

250,985

Could be a couple of other things, read this...https://www.obd- codes.com/p0401

590

VSV for EGR. Fun to get to! Mounted on the back of the engine about half way up.

1,930

I seem to remember a hose coming off the Exhaust System and connecting to the bottom of that EGR Modulator. Check it out. Is the hose cracked and brittle? Is the hose plugged with carbon.

1 of 1 people found this helpful.

There's not enough heat coming through your egr valve to tell the computer it is working. EGR may not be opening even though you have a new modulator valve for it. Temp sensor bad, not plugged in electrically, or just insulated by too much carbon build up. Probably carbon clogged metal line from exhaust to egr valve. Clean the line first, but clean the temp sensor off at the same time.

1,930

FWL....did you ever resolve the issue with this vehicle?

Replaced EGR valve and still have engine light on after 100 miles. Also, exhaust has very strong smell, thought no smoke.

1,930

Since this EGR System is dependent on Exhaust System Back Pressure to function properly....you might consider having ...exhaust system back pressure TESTED. This is done by removing the Pre-Cat O2 sensor and installing a low PSI Gauge. Pressures more tha 2-3 PSI would indicate a possible restricted CAT.

1 of 1 people found this helpful.

Your Answer

Camry

Looking for a Used Camry in your area?

CarGurus has 72,799 nationwide Camry listings starting at $1,000.

ZIP:

Toyota Camry Experts

  • #1
    Reelin68
    Reputation
    13,270
  • #2
    Tom Demyan
    Reputation
    4,550
  • #3
    tenspeed
    Reputation
    2,990
View All

Related Models For Sale

Used Honda Accord
1,027 Great Deals out of 63,281 listings starting at $999
Used Toyota Corolla
932 Great Deals out of 66,537 listings starting at $1,900
Used Honda Civic
850 Great Deals out of 78,667 listings starting at $900
Used Nissan Altima
1,140 Great Deals out of 75,113 listings starting at $999
Used Toyota Avalon
279 Great Deals out of 16,447 listings starting at $1,095
Used Toyota RAV4
904 Great Deals out of 60,619 listings starting at $1,690
Used Hyundai Sonata
755 Great Deals out of 47,839 listings starting at $199
Used Toyota Highlander
452 Great Deals out of 25,377 listings starting at $2,299
Used Nissan Maxima
325 Great Deals out of 23,753 listings starting at $1,550
Used Honda CR-V
905 Great Deals out of 55,003 listings starting at $1,007
Used Toyota 4Runner
239 Great Deals out of 21,559 listings starting at $1,500
Used Chevrolet Malibu
1,247 Great Deals out of 78,132 listings starting at $1,500
Used Toyota Prius
353 Great Deals out of 18,950 listings starting at $1,500
Used Toyota Tacoma
561 Great Deals out of 42,349 listings starting at $2,999

Used Cars For Sale

2018 Toyota Camry For Sale
12,398 listings starting at $21,464
2017 Toyota Camry For Sale
75 Great Deals out of 24,597 listings starting at $13,991
2016 Toyota Camry For Sale
124 Great Deals out of 6,143 listings starting at $9,995
2015 Toyota Camry For Sale
127 Great Deals out of 5,061 listings starting at $9,500
2014 Toyota Camry For Sale
301 Great Deals out of 8,152 listings starting at $6,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.