HELP PLEASE!!!!!

I have a patent answer for you. Had the same trouble with a Tercel. Both O2 sensors, EGR checked good, replaced the PCV, etc. Until I replaced the vaccuum hoses. I didn't try to troubleshoot it, I just bought a whole roll and replaced them ALL. That did it.

What you can try is reaching inside (behind) the glove box (ENGINE AND KEY OFFFFFF!!!!!!) and disconnect the plug to the computer. This will reset it. I could usually drive for a couple days, full power, full fuel economy, before the MIL came back on again.

Your check engine light is staying on because your car is trying to tell you something. Do you know what the trouble code is?

Your husband mechanic should know that the car is OBD II (On Board Diagnostics, Level 2) compliant, and he can buy a diagnostic code reader on eBay for about $100. This handy device will tell him exactly what the car thinks is wrong with it, and all he needs to do is determine which codes can have a ripple effect that cause other codes -- for example the gas cap code is part of a family of about 20 codes that are all pretty much interrelated.

Maybe you need a new mechanic ...

You need better parenting skills so you can teach your child to obey you and not open the door to the car without your permission.

CP

You posted that wrong. It confused me until I went back to the OP.

You have not provided enough information for anyone to provide an invormed answer as to the cause of the check engine light. As someone else mentioned and as your husband-a mechanic and your uncle-mechanic should know, your car is On Board Diagnostice generation II (OBD II) compliant. That means any OBD II code reader can read the codes and should be able to clear the trouble codes stored in your car's computer. The OBD II system can store multiple trouble codes, and assuming your husband-a mechanic and your uncle-mechanic are checking for mutiple codes, we would need the codes currently stored in the computer memory to provide a response.

If the codes are still pointing to the oxygen sensor, then the questions are: What are the actual trouble codes? Was the replacement sensor(s) OEM or aftermarket? Is the replacement sensor a heated one? What are the voltage readings from the O2 sensor? Did husband-a mechanic and your uncle-mechanic check the wiring between the O2 sensor and the ECU?

Your husband or uncle can purchase daily or annual access to Toyota's technical publications at

or you can search the web for previouis posts of the procedure for programming rthe keyless entry remote, assuming that the system is a factory accessory and not an aftermarket one.