2007 Corolla with a P0171 code and seemingly infamous P0741 code (the engine light came on and both codes showed up in a dealer's scan). 66,000 miles, so outside the warranty. The dealer just rese

These code cover a few different areas. You might need to get a Good mechanic to look at the vehicle.
p1519 - Intake Manifold Runner Control (Stuck Closed). This will affect your Fuel air mixture and might explain the high revs. This is a valve controlling fuel/air flow to give an even flow at all engine speeds.
Codes p0171 and p0174 both refer to the fuel mixture being too weak.
The p0741 is on the Transmission. There is an issue with the torque converter electronics.

p1519 - Intake Manifold Runner Control (Stuck Closed).
p0171 - System too lean, bank 1.
p0174 - System too lean, bank 2.
p0741 - Torque Converter Clutch Circuit Performance/Stuck Off.

2000 Toyota Corolla, P0171 & P0420 codes - YouTube

? 5:43
https://www.youtube.com/watch?v=ahJnJ19-vwY
Jun 13, 2011 - Uploaded by StandardBrandParts
Standard Motor Products presents: Technician's Toolbox "2000Toyota Corolla, P0171 & P0420 codes"

Smoke testing for codes P0171 P0174 - YouTube

? 5:48
https://www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast
These two codes mean a V style engine is running lean on both banks. So you have to be thinking - what can ...

How to repair fault code P0171 and reset warning light ...

? 26:31
https://www.youtube.com/watch?v=Y8FBGrCT3rM
Nov 27, 2014 - Uploaded by Peter Finn
How to repair and fix fault or error code P0171 and reset warning light Toyota Corolla VVT-i engine. ... Also how to find fault codeusing OBD scanner. ... Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, ... 2000 Toyota Corolla, P0171 & P0420 codes - Duration: 5:43. by ...

P0171 Trouble Code - YouTube

? 4:53
www.youtube.com/watch?v=d4wNywEo1o8
May 6, 2014 - Uploaded by richpin06a Toyota Corolla Chevrolet Prizm P0171 Trouble Code.

Just take car to AutoZone to use their Diagnostic Code Reader and then they can look it up and tell you what is wrong and part that you should replace.

You can have your transaxle rebuilt for $2000.00 or less
no need to be at a dealer

Check this link out. P0741 OBD II Trouble Code

Consult the manual that came with the scan tool to decode.

There is a Toyota TSB for a Computer malfunction.
There is a campaign for that, take it to your Dealer for repair, should be no charge

http://www.xcardiag.com/wholesale/high-quality-toyota-intelligent-tester2-it2-with-suzuki-47.html

P0741 deals with internal transmission torque converter slip. A proper scan tool that is capable of reading the sensor's data inside the transmission would show the slipping torque converter and the fluid temperature.
It is critical to know exactly what conditions are present when the code stores. If the codes were not erased, they could be old codes in it's history.
Go back to the transmission shop or where you had the work done on replacing the TCC solenoid and have them read and clear the codes history. As mentioned, they could be old codes that is being read prior to your repairs.
Thank you for using Fixya and good luck, Have a shop verify line pressure, and provided no valves in the TCC hydraulic circuit are worn, replace the torque converter. Also, Lubegard Shudder Fix will at least fix this for awhile. Or try a transmission flush by a shop that uses BG brand products.

p0171 is lean condition bank one. you could have a vacuum leak a bad map sensor bad maf sensor clogged fuel filter low fuel pressure. start with the vacuum leak first.

Without seeing your vehicle on my scan tool, it is hard to see what is exactly going on.
But, please allow me to share the following info with you:
The P-0171 code relates to the Mass Airflow Sensor. This is a VERY common code with the Corolla product.Your dealer *** should *** have inspected it for dirt contamination, and cleaned it, if it was indeed dirty.
Secondly, The P-0125 relates to Oxygen Sensor number ONE. If your dealer replaced the wrong sensor; (#2), you can expect to have problems.
My advice: unplug, remove, inspect & clean the MAF sensor. Ensure that the air filter is clean.
This should help you quite a bit.