Hyundai Repair: check engine lamp on, hyundai elantra, exhaust leaks

Question
Hello,

Just found this forum when I have trouble with my 2001 Hyundai elantra.

I did a lot of travel with my 2001 hyundai car, I have put 1530000 mile one it with regular oil change, tire rotate, 3 sets of new tire.

Now my check engine light on with follow codes:

P0442
Po133
P1529
P0713,

Could anyone here could help me to de-code them? what kind of repair I am going to need to make my car run again? Is it safe now to drive with light on?

Can I fix some problem above by myself? I am not expert on DIY,but like to try if it is not very hard.

John


Answer
P0133 indicates slow response from the front oxygen sensor.  Check for any exhaust leaks in the manifold, converter and front pipe area, paying special attention to the manifold and the flex area of the pipe.  Even a small leak in one of these areas can cause code P0133.  If there are no exhaust leaks, replace the front oxygen sensor.

P0442 indicates a small fuel vapor leak.  This can occur due to a loose fuel cap.  After repairing your other items, I'd recommend clearing the codes by disconnecting the battery.  If this code doesn't return, chalk it up to a not properly sealed fuel cap.

P0713 indicates that your transmission fluid temperature sensor is reporting too high a temperature.  This could be due to a variety of reasons, including a shorted wire or sensor, or the transmission actually overheating.  I'd recommend having the dealer diagnose this problem, since a scan tool will be necessary to determine what sort of problem is occurring.  

P1529 indicates that the transmission control module (TCM) requested the engine control module (ECM) to turn on the check engine lamp.  This occurred because the TCM recognized the problem with the fluid temperature reading.

The transmission issue is the sticking point in terms of driving the vehicle.  When the problem is occurring, the TCM will put your transmission in 3rd gear and not allow it to shift.  Starting out in 3rd gear puts tremendous strain on the transmission.  If the problem is not currently occurring, however, turning the vehicle off and restarting it will return the transmission to normal operation until the problem again reoccurs.  The problem causing P0442 has no consequence to vehicle operation.  The issue causing P0133 may result in lowered fuel economy and a slight decrease in engine performance, but otherwise the vehicle should drive normally.