Brake booster,VSC CEL and traction
30

Asked by David Apr 23, 2016 at 07:52 PM about the 2006 Toyota RAV4 Base

Question type: Maintenance & Repair

Trying to figure this one out. I can hear the vaccum
leak, but I'm curious if the brake booster failing
would cause these light to come on in my Toyota
RAV4? PO171 was the code when I checked.

2 Answers
221,125

Rowefast answered 8 years ago

No not the brake booster. P0171 TOYOTA - Air/Fuel Mixture System Lean Bank 1.... Possible causes - Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection.... If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

2 people found this helpful.
Mark helpful
30

David answered 5 years ago

So, somehow I missed your response, rowefast! It was the front o2 senor afterall. I replaced that along with a ignition coil and it was still running strong until I sold it for salvage when I got a new car a few months ago!

Mark helpful

Your Answer:

Related Questions

  • Brake booster,VSC CEL and traction 2 Answers

    Trying to figure this one out. I can hear the vaccum leak, but I'm curious if the brake booster failing would cause these light to come on in my Toyota RAV4? PO171 was the code when I checked.

    2006 Toyota RAV4 Base

    -

    Maintenance & Repair

  • CEL, VSC, 4WD sensors on in my 2007 RAV4 V6 1 Answer

    I had these lights come on and stay on yesterday. Read some of the easy fixes like gas cap, etc... Took my car to Autozone and they ran a diagnostic report which said the following below. Is there any...

    2007 Toyota RAV4 Base V6

    -

    Maintenance & Repair

  • Vsc track and check engine light On 2 Answers

    Idle ruff,VSC Track,and Engine Light ON

    2005 Toyota RAV4 Base

    -

    Maintenance & Repair

  • 2007 Rav4,2.4 L, CEL, VSC and 4WD lights ON 1 Answer

    Got the lights ON after a mechanical inspection of the car. Code PO402 (bad cat converter in bank-1). 4-WD does not engage after that. Will changing cat converter solve the problem? or is there any ot...

    2007 Toyota RAV4 Limited AWD

    -

    Maintenance & Repair

  • Check engine light traction and 4 wheel drive 4 Answers

    3 lights on on dash check engine 4 wheel drive and traction

    2009 Toyota RAV4 Limited 4WD

    -

    Maintenance & Repair

Shortcuts

Search Toyota RAV4 Questions

CarGurus Experts

  • #1
    CHARLES DEFAZIO
    Reputation
    4,730
  • #2
    Evie Hunt
    Reputation
    4,150
  • #3
    kathymay22
    Reputation
    3,290
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Honda CR-V
181 Great Deals out of 4,905 listings starting at $440
Used Toyota Highlander
34 Great Deals out of 866 listings starting at $7,498
Used Toyota Camry
50 Great Deals out of 1,057 listings starting at $2,500
Used Toyota 4Runner
21 Great Deals out of 530 listings starting at $7,700
Used Toyota Corolla
141 Great Deals out of 2,245 listings starting at $3,495
Used Toyota Tacoma
43 Great Deals out of 820 listings starting at $2,030
Used Subaru Forester
32 Great Deals out of 1,248 listings starting at $3,995
Used Lexus RX
43 Great Deals out of 1,191 listings starting at $3,997
Used Honda Accord
44 Great Deals out of 985 listings starting at $2,995
Used Honda Civic
192 Great Deals out of 4,047 listings starting at $2,877
Used Honda Pilot
44 Great Deals out of 1,034 listings starting at $3,800

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