Something leaking in car

60

Asked by May 18, 2015 at 12:02 PM about the 1998 Toyota Corolla LE

Question type: Maintenance & Repair

I had replaced my gasket few days back and this codes are showing up in OBD reader don't know why and if it is serious? There is something leaking in car

P0302 - Cylinder 2 Misfire Detected
P0304 - Cylinder 4 Misfire Detected
P0303 - Cylinder 3 Misfire Detected
P0135 - O2 Sensor Heater Circuit Bank 1 Sensor 1
P0300 - Random/Multiple Cylinder Misfire Detected
P0420 - Catalyst System Efficiency Below Threshold Bank 1

11 Answers

What makes you say something is leaking? Puddles or visible fluids? If so please describe. Where, color of fluid. None of those codes have anything to do with a leak. Misfires on cylinders can be caused by a multitude of things, and especially the P0300. Do you have the 1.8L?

The P0135 is not necessarily a bad o2 sensor. It's a heated sensor and the code is almost self-explanatory, the heating circuit to it. The P0420 MAYBE is a bad cat, but cats are damaged by lean running, and a vacuum leak, working backwards vacuum leak= lean= ruined cat after a period of time

60

yes i have 1.8L and i can see few drops on the ground and under the hood its look like something is leaking one of my friend said its because of Head gasket can it really be the issue?

2 of 2 people found this helpful.

Possibly. But let's not jump too far ahead What gasket did you replace?

60

i had replaced head gasket and spark plugs 3 months back and color of liquid is not sure but it looks like yellowish but leak is not much little i had into minor accident 2 days back was hitted on front right slightly no outer damage

1 of 1 people found this helpful.

ok, more questions. Is it-was it-- overheating, before and/or after head gasket job? How does the motor oil look? Have you done a compression check?

1 of 1 people found this helpful.

And ignore the bank 1 stuff. It only has one bank

60

no over heating car is driving smooth no such issues while driving, heating and AC also works good only when i put fan on or ac it gives some scratching noise some time other than that car is working well it consumes more oil usually i have to do oil change in 2000-2500 miles and other thing i'm worried is there is something leaking

1 of 1 people found this helpful.

Hopefully when the head was off it was sent out for a magnaflux at least, to check for cracks in head, and maybe even milled just SLIGHTLY, and a valve job. Sure, it cost more but is money well spent. Since the car is running well, and not overheating, if the fluid leak is small I really wouldn't worry about it. But if your motor oil begins to look like chocolate milk, or if you see bubbles in radiator while running (don't pop a hot cap), do a compression check. If none of those things happen, I wouldn't be too concerned. Look around for obvious vacuum leaks, like a hose off. If you find one, that is probably the main problem

60

ok thanks for reply

I forgot, if it is blowing white/blue tint smoke from tail pipe, DO the compression check

Your Answer

Corolla

Looking for a Used Corolla in your area?

CarGurus has 65,643 nationwide Corolla listings starting at $1,699.

ZIP:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,510
  • #2
    tenspeed
    Reputation
    1,850
  • #3
    tennisshoes
    Reputation
    1,810
View All

Related Models For Sale

Used Toyota Camry
1,076 Great Deals out of 86,843 listings starting at $800
Used Honda Civic
814 Great Deals out of 60,960 listings starting at $950
Used Honda Accord
1,129 Great Deals out of 73,674 listings starting at $1,100
Used Toyota RAV4
838 Great Deals out of 53,246 listings starting at $1,600
Used Nissan Altima
1,333 Great Deals out of 77,841 listings starting at $1,695
Used Nissan Sentra
786 Great Deals out of 51,040 listings starting at $2,100
Used Toyota Tacoma
718 Great Deals out of 45,626 listings starting at $1,000
Used Hyundai Elantra
677 Great Deals out of 50,724 listings starting at $1,500
Used Honda CR-V
899 Great Deals out of 59,695 listings starting at $1,495
Used Hyundai Sonata
903 Great Deals out of 56,689 listings starting at $1,500
Used Toyota 4Runner
333 Great Deals out of 26,793 listings starting at $1,800
Used Toyota Yaris
73 Great Deals out of 2,870 listings starting at $2,200
Used Ford Focus
812 Great Deals out of 62,343 listings starting at $900

Used Cars For Sale

2018 Toyota Corolla LE For Sale
18,072 listings starting at $14,375
2017 Toyota Corolla LE For Sale
46 Great Deals out of 2,690 listings starting at $9,600
2016 Toyota Corolla LE For Sale
93 Great Deals out of 3,498 listings starting at $8,990
2015 Toyota Corolla LE For Sale
79 Great Deals out of 2,108 listings starting at $7,992
2014 Toyota Corolla LE For Sale
31 Great Deals out of 901 listings starting at $7,700

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.