The check engine, VSC, and 4WD lights keep coming on at the same time.

Asked by Aug 22, 2015 at 05:45 PM about the 2007 Toyota RAV4 Base

Question type: Maintenance & Repair

The lights are on in my car.  Have had both oxygen sensors replaced.  The lights go off for a day, then they come back on.  One mechanic said maybe it needs a software update, other said maybe it was that the sensor was not an official Toyota part  (the front sensor was a Toyota part).  This car does have a recall on it for an oil consumption issue.  However, they have not figured out a remedy for it yet.  All other recalls have been addressed.  I screwed the gas cap on properly and lights are still on.  Any advice?

11 Answers

Have you had - or did the mechanic do an OBDII scan? And 02 sensors really should be Denso. But not absolutely critical.. other brands will work and not cause the CEL to come on

4 of 4 people found this helpful.

Also, there is nothing wrong with the VSC. Toyota/Lexus uses not only the braking system, but also controls the throttle to help get the RAV out of tricky situations with VSC. If the engine is not running right, the ECM shuts down those systems

3 of 3 people found this helpful.
120

My Toyota Rav4 suddenly had VSC, Check Engine, & 4 wheel drive lights come on and stay on. Also noticed a little rough idling when first starting my vehicle. Took it to my local dealership and they immediately diagnosed the problem as a loose vacuum hose! Checked it and, sure enough, a hose had worked loose. They reconnected hose, reset lights, and all is well for now! Hope that is all there is to it! Zero cost for repairs! Thank you Bristol Toyota!

12 of 12 people found this helpful.
20

Hi Evie, My RAV4 is doing this exact same thing. The code came up "Lean Fuel" which my mechanic said could be an O2 sensor or possibly 5-6 other things. He cleaned my spark plugs and reset the lights. Lights stayed off for 2 days then came back on.:-( Could it be something as simple as a loose vacuum hose? I will ask. Thanks for the info. Fingers crossed!

2 of 2 people found this helpful.
20

It was a loose gas tank cap.

2 of 2 people found this helpful.
20

It takes a few tries and a few days.

40

On my 2011 RAV4 this is all due to a poor design of rubber tubing downstream (to the left) of the Mass Air Flow Sensor. This tubing is a "press fit" into the air manifold and twice it has worked its way out of the manifold. When it does, the 3 lights that come on are always VSC, Check Engine & 4WD. Before taking your vehicle to any dealer, please open your hood and look to the manifold to the left (downstream) of your air filter. Stupid design gives all of us RAV4 drivers many moments of apprehension that are unnecessary. To get the fitting end back in all of the way in the air manifold takes some hard pressing. There should be a mechanical fastener there so this does not occur, but the connection is at a funny angle and there is really no way to rig anything.

4 of 4 people found this helpful.
10

Thanks Charles and others who had commented on the rubber tubing coming loose. That exactly was the problem I had with my 2012 RAV4. Travel through some rough roads probably had made it come off the connection which doesnt have any clamps or anything else to hold it in its place. Bad design.

1 of 1 people found this helpful.

I am so glad I found this post! It's been driving me crazy. I'm going to have my BF look at the hose tomorrow. FINGERS CROSSED!! :)

Can this issue happen even if it is not all the way off? Mine was not seated all the way on. I pushed it all the way back in and reset the code. I'll have to see if it comes back on.

40

My lights only came on when the tubing was all of the way out. Actually, the first time it happened I could hear a difference in the noise of air flow in the engine compartment. Both times I had a friend who could reset the code for me using a hand-held analyzer that costs about $50 at Harbor Freight.

Your Answer

RAV4

Looking for a Used RAV4 in your area?

CarGurus has 61,687 nationwide RAV4 listings starting at $1,995.

ZIP:

Toyota RAV4 Experts

  • #1
    Tom Demyan
    Reputation
    2,990
  • #2
    Robert Mitchell
    Reputation
    1,330
  • #3
    kathymay22
    Reputation
    1,090
View All

Related Models For Sale

Used Honda CR-V
700 Great Deals out of 63,126 listings starting at $1,495
Used Toyota Highlander
523 Great Deals out of 42,444 listings starting at $2,009
Used Toyota Camry
1,089 Great Deals out of 76,308 listings starting at $1,100
Used Toyota Corolla
918 Great Deals out of 70,126 listings starting at $1,479
Used Nissan Rogue
784 Great Deals out of 74,385 listings starting at $1,999
Used Toyota 4Runner
344 Great Deals out of 29,288 listings starting at $1,500
Used Honda Accord
800 Great Deals out of 88,860 listings starting at $1,444
Used Toyota Tacoma
561 Great Deals out of 40,710 listings starting at $2,600
Used Subaru Forester
287 Great Deals out of 37,590 listings starting at $1,103
Used Ford Escape
1,161 Great Deals out of 107,336 listings starting at $995
Used Honda Pilot
587 Great Deals out of 37,375 listings starting at $1,995
Used Honda Civic
605 Great Deals out of 52,171 listings starting at $999
Used Nissan Murano
440 Great Deals out of 24,768 listings starting at $400
Used Hyundai Tucson
201 Great Deals out of 21,736 listings starting at $1,500

Used Cars For Sale

2018 Toyota RAV4 For Sale
41,711 listings starting at $21,918
2017 Toyota RAV4 For Sale
74 Great Deals out of 2,355 listings starting at $16,173
2016 Toyota RAV4 For Sale
57 Great Deals out of 2,228 listings starting at $14,691
2015 Toyota RAV4 For Sale
200 Great Deals out of 6,527 listings starting at $11,998
2014 Toyota RAV4 For Sale
88 Great Deals out of 1,863 listings starting at $10,800

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.