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?

6 Answers

1,165

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

2 people found this helpful.
5,680

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 people found this helpful.
40

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 people found this helpful.
5,680

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.

5,680

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 people found this helpful.

Your Answer:

Camry

Looking for a Used Camry in your area?

CarGurus has 1,819 nationwide Camry listings starting at $2,000.

Postal Code:

Toyota Camry Experts

  • #1
    Reelin68
    Reputation
    18,040
  • #2
    last_chance_garage
    Reputation
    5,650
  • #3
    dandyoun
    Reputation
    3,620
View All

Related Models For Sale

Used Honda Accord
59 Great Deals out of 1,675 listings starting at $1,995
Used Toyota Corolla
143 Great Deals out of 4,294 listings starting at $2,288
Used Honda Civic
170 Great Deals out of 5,069 listings starting at $399
Used Toyota Avalon
6 Great Deals out of 221 listings starting at $2,888
Used Nissan Altima
64 Great Deals out of 1,515 listings starting at $1,495
Used Toyota RAV4
87 Great Deals out of 3,512 listings starting at $4,987
Used Nissan Maxima
20 Great Deals out of 395 listings starting at $3,677
Used Toyota Highlander
22 Great Deals out of 1,262 listings starting at $3,450
Used Hyundai Sonata
50 Great Deals out of 1,726 listings starting at $3,999
Used Honda CR-V
65 Great Deals out of 3,015 listings starting at $1,999
Used Toyota Tacoma
41 Great Deals out of 1,661 listings starting at $5,450
Used Toyota 4Runner
18 Great Deals out of 528 listings starting at $6,499
Used Toyota Prius
6 Great Deals out of 207 listings starting at $3,995
Used Chevrolet Malibu
56 Great Deals out of 1,695 listings starting at $449
Used Kia Optima
40 Great Deals out of 967 listings starting at $4,995

Used Cars for Sale

2019 Toyota Camry For Sale
149 listings starting at $26,390
2018 Toyota Camry For Sale
11 Great Deals out of 486 listings starting at $23,407
2017 Toyota Camry For Sale
14 Great Deals out of 252 listings starting at $15,687
2016 Toyota Camry For Sale
5 Great Deals out of 80 listings starting at $15,487
2015 Toyota Camry For Sale
10 Great Deals out of 215 listings starting at $12,990

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. Content will be removed if CarGurus becomes aware that it violates our policies.