20 Most Recent 2004 Toyota Corolla - Page 2 Questions & Answers

It's not the air conditioning because the problem happened after a rainfall. The air conditioning would cause a wet rug while the air is on and it is very warm and humid outside. Then I could see a plugged drain causing the issue. It may be a leak around the windshield area or sunroof if you have one. Start your car and put your fan on high. close the windows and doors. Spray a soap and water solution around the outside of the car starting around the windshield area. Look for bubbles forming. When you find the bubbles you found your leak.

The converter was clogged probably due to rich exhaust. U have emissions codes in your ecm which says the emissions are still not within spec or a second problem exists. The ecm needs to be scanned and the live readings of the sensors must be read to get a head start on the problem. It doesn't necessarily have to be an electronic problem. (leaking injectors,O2 sensors, plugs ect) I advise u to take it in unless u know someone who can handle it outside a shop.

Try taking the efi relay out for about a min and than reinstalling,or just remove batteries out and reinstall.
Computer might need resetting by a Tech head with proper diagnostic tool

No Corolla built after 1999 has a belt. No need to change the timing chain,EVER, This is a FixYa.

I would say you have either a bad seal on the windshield or the seal on the passenger door opening.

It's most likely the left wheel bearing that's causing the noise, when turning to the right the weight of the car shifts to the left placing more load on the left wheel bearing and takes load off the right bearing.

If this happening with all the doors when it happens, I would suspect the lock relays are getting old and tired. Replace the power lock relay or relays.

2004 TOYOTA COROLLA SERVICE REPAIR MANUAL DOWNLOAD for the easy solution download the pdf file

check both fuse panels under dash and under hood

It sounds like you blew fuses other than just the main fuse. Hooking the battery up wrong can destroy major components as well, like the starter, battery, Computer, moduals. You might need a good shop....

firstly it could be that the check engine light is mal-functioning or not. why not drive it as they said and if after that its still on get back to us.

most likely idle air control valve on throttle body remove rubber air duct that runs from air filter spray real good with carb spray wait 30 minutes for it to dry should improve condition

Download Link: 2004 toyota corolla factory service repair manual PDF DOWNLOAD

Here's a link to where your engine number is. Repair Guides Engine Identification Engine Identification AutoZone com

According with manual should be between 0,6-0,7 mm You must check with an drill bit with this dimensions

Your catalytic convert is probably plugged , you should have the exhaust system back pressure tested . Tech Tip Backpressure Testing

The problem is most likely not the ecm. What makes you believe that it is?