hi, my engine light came up and it gave me 05 03.
which is 'Front Right Heated O2 sensor'
What does this mean, and how can I fix it?
thanks to all of you reply.

 

You will find some information about Diagnostic Trouble Code 0503 in the Sticky titled ECU Diagnostic Trouble Codes. The fix is to replace the faulty Oxygen Sensor.

Replacing an Oxygen Sensor is something that may be done by the home mechanic. This topic is covered in the Chilton repair manual (page 4-14) and the Haynes repair manual (page 6-15). Oxygen Sensors are accessed from below the vehicle. You will need a good jack, a pair of sturdy jackstands, and an assortment of ordinary hand tools. There are special sockets made for removing Oxygen Sensors but you can probably "make do" with a combination wrench. Oxygen sensors tend to be really tight; don't be surprised if you have to use a lot of muscle to remove one. When you install an Oxygen Sensor it's a good idea to put a dab of anti-seize lubricant (Nevr-Seez or equivalent) on the threads.

Installing a new Oxygen Sensor will not immediately turn off the Check Engine Light or clear any codes. You have to do that yourself. You will find instructions to do a DTC readout and reset the Check Engine light at:
http://vbxmaxima.8m.com/ecu.html

For general information about Oxygen Sensors see:
http://www.volksparts.com/o2sensors.htm
http://members.aol.com/carleyware/library/o2sensor.htm

 

We need a big flashing NEON to inform people to look at stickys