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

Add photo

Related Questions

Corolla

Looking for a Used Corolla in your area?

CarGurus has 69,386 nationwide Corolla listings starting at $1,800.

ZIP:

Search Toyota Corolla Questions

Toyota Corolla Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,430
#2 tenspeed
tenspeed
Reputation 1,840
#3 tennisshoes
tennisshoes
Reputation 1,730
View All

Related Models For Sale

Used Toyota Camry
1,203 Great Deals out of 83,783 listings starting at $750
Used Honda Civic
850 Great Deals out of 84,348 listings starting at $750
Used Honda Accord
1,043 Great Deals out of 67,782 listings starting at $1,000
Used Toyota RAV4
879 Great Deals out of 63,992 listings starting at $1,990
Used Nissan Altima
1,263 Great Deals out of 75,204 listings starting at $1,695
Used Hyundai Elantra
642 Great Deals out of 41,442 listings starting at $900
Used Nissan Sentra
620 Great Deals out of 52,287 listings starting at $1,000
Used Toyota Tacoma
531 Great Deals out of 42,957 listings starting at $1,995
Used Honda CR-V
968 Great Deals out of 56,812 listings starting at $1,000
Used Toyota Yaris
94 Great Deals out of 3,736 listings starting at $2,499
Used Hyundai Sonata
841 Great Deals out of 47,695 listings starting at $1,195
Used Ford Focus
799 Great Deals out of 54,532 listings starting at $1,200

Used Cars For Sale

2017 Toyota Corolla LE For Sale
15 Great Deals out of 18,475 listings starting at $12,900
2016 Toyota Corolla LE For Sale
81 Great Deals out of 2,992 listings starting at $9,895
2015 Toyota Corolla LE For Sale
49 Great Deals out of 1,818 listings starting at $8,491
2014 Toyota Corolla LE For Sale
91 Great Deals out of 1,784 listings starting at $6,500
2013 Toyota Corolla LE For Sale
27 Great Deals out of 721 listings starting at $4,995

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.