Why is my check engine light and VTM-4 light coming on when my car gets wet?

120

Asked by Apr 29, 2016 at 08:35 AM about the 2009 Honda Pilot EX-L w/ DVD 4WD

Question type: Maintenance & Repair

I have a 2009 Honda Pilot EX-L 4WD. I've noticed that when it rains or snows my check engine and VTM-4 light comes on. In about a day or so they both will go away? What could this be???

11 Answers

73,845

If this is a problem developing a code would be stored in the computer. I would say go to like Auto Zone to have it checked for codes. If there is a code, then you would know what to look at to fix the problem. You can post the code back here for the meaning and cause.

4 of 4 people found this helpful.
120

I have gone by auto part store a had code pulled. Its reading P0175 bank 1 system to rich.

4 of 4 people found this helpful.
73,845

This means...P0175 HONDA - Fuel System Too Rich Bank 2... Possible causes - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Faulty Mass Air Flow (MAF) sensor ......................................................................................................... - Fuel injection system does not operate properly. - The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)... Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) - Excessive Fuel Consumption... P0175 Honda Description... With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).

5 of 5 people found this helpful.
120

Is this just a sensor I can purchase? Oxygen Sensor? I really appreciate your help!

3 of 3 people found this helpful.
73,845

Yes, more than likely the front 02 sensor, the one closest to the engine. The MAF can be cleaned with electrical cleaner at the plugin. Take apart and clean.

4 of 4 people found this helpful.
120

Awesome! Sounds easy enough... Thank you for the speedy response.

3 of 3 people found this helpful.
120

I've gone online to view this 02 Sensor. They all say " Upstream or Downstream"? Which one would I need to get?

2 of 2 people found this helpful.
73,845

Up-stream...

2 of 2 people found this helpful.
180

2005 honda pilot check engine end vtm4 on

12 of 12 people found this helpful.
180

Am driving after one my,the vtm4 on

6 of 6 people found this helpful.
10

I was told by the dealer whenever the check engine light comes on the VTM-4 light will also intermittently come on. The issue may not be related to VTM-4.

1 of 1 people found this helpful.

Your Answer

Pilot

Looking for a Used Pilot in your area?

CarGurus has 30,534 nationwide Pilot listings starting at $1,399.

ZIP:

Honda Pilot Experts

  • #1
    Fordtudor37
    Reputation
    600
  • #2
    Patrick Jay R
    Reputation
    520
  • #3
    jmtnh
    Reputation
    490
View All

Related Models For Sale

Used Toyota Highlander
416 Great Deals out of 27,538 listings starting at $1,999
Used Honda CR-V
798 Great Deals out of 53,945 listings starting at $1,750
Used Acura MDX
416 Great Deals out of 17,933 listings starting at $1,975
Used Toyota 4Runner
281 Great Deals out of 21,676 listings starting at $1,750
Used Honda Odyssey
339 Great Deals out of 24,195 listings starting at $950
Used Nissan Pathfinder
318 Great Deals out of 24,447 listings starting at $1,250
Used Ford Explorer
832 Great Deals out of 63,572 listings starting at $1,000
Used Honda Accord
1,068 Great Deals out of 61,078 listings starting at $1,099
Used GMC Acadia
806 Great Deals out of 47,974 listings starting at $2,995
Used Chevrolet Tahoe
668 Great Deals out of 39,457 listings starting at $1,000
Used Toyota Sienna
291 Great Deals out of 26,577 listings starting at $1,985
Used Toyota RAV4
780 Great Deals out of 49,625 listings starting at $1,500
Used Jeep Grand Cherokee
881 Great Deals out of 70,428 listings starting at $950
Used Chevrolet Traverse
658 Great Deals out of 34,230 listings starting at $2,700
Used Kia Sorento
435 Great Deals out of 28,601 listings starting at $1,999

Used Cars For Sale

2015 Honda Pilot EX-L w/ DVD 4WD For Sale
61 listings starting at $26,000
2014 Honda Pilot EX-L w/ DVD 4WD For Sale
28 listings starting at $22,980
2013 Honda Pilot EX-L w/ DVD 4WD For Sale
47 listings starting at $15,495

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.