Had autozone check DTC codes after TRAC, VSC, & engine check lights came on. DTC showed P0051-P2241 codes- Bank 2 sensor 1- A/F oxygen sensor. Will purchase replacement OEM part and install myself. My question is: after replacing what procedures do I take? Do I have to get the fault codes erased (autozone)? Do I need to have Toyota do a reflash on my ECU-ECM? Or just drive the car until the ECM recognizes the replacement.
Any help will be appreciated.

 

No reflash required.

If you want the light to be out now after replacing the part, have AZ clear codes. Otherwise the ECM will run its checks and the if fault is now fixed, turn off the light.

 

Can anyone tell me which fuse I should pull to reset the ECU after replacing faulty A/F sensor. Is it true that if I don't have the ECU flashed by the dealer, I chance shortening the life of the new sensor.

 

You can't reset the ECU by pulling a fuse. Need a scanner/reader.

Where did you get the idea the ECU needs reflashing?

 

Two local mechanics suggested having the ECU reflashed so I don't burn out the new A/F sensor prematurely. So you are saying I just need to have Autozone erase the DTC codes with their scanner and the ECU will correct itself.
I am a newcomer with this forum and finding it very valuable. Can't say how much I appreciate your help. BUD

 

A reflash is to reinstall the computers software. The software might be upgraded by the manufacturer to solve performance issues. Is this what these mechanics are suggesting?

There is also a reset where the computer resets to the basic programming. Some computers adapt to your driving to modify the programming. Disconnecting the battery or ECU fuse will reset this programming to factory.

On this year Camry, disconnecting the battery does not clear any codes. This needs a scanner.

There was a TSB for 2003 Camry V6 and an upgraded sensor. Part number remained the same.

Highlander with V6 had a TSB for possible reflash and sensor issues.

If these mechanics are doing the work, have them show you the info they are using to state the this year and engine model needs reflashing.

 

I am not having any performance issues, although I may be getting poorer fuel economy. New OEM A/F sensor is due to arrive tomorrow and I will install. Will then take to AutoZone and have the codes cleared. This is what their scanner will do? right? Then will drive to see if all corrects itself. Ironically, this problem developed with the odometer reading 99998.2 miles. The only problem I have ever had with this car is an alternator going bad and one battery replacement. Have always been a dedicated Ford owner myself. This is my spouse's vehicle. Has always been a pleasure to drive and have noticed from consumer report, 2005 was one of camry's most trouble free years. Thank you again for you advise. Bud

 

I would disconnect the battery, install new part, wait overnight, and then reconnect the battery. Start the car and just let it run till the temp gauge reaches normal running temp and then drive it around like you would normally.