P0471 code 2007 Corolla with the seemingly infamous P0471 code. 66,000 miles, so outside the warranty. The dealer just reset the code and told me if it comes back on, I probably need a new transmission. The car is running well as it always has. The transmission fluid is a normal red color. My daughter will be driving this car, and I don't want a major transmission issue while she is driving it, but I also don't want to put out 4K for a new transmission. Any suggestions on how to proceed?

The DPF is designed to be self-cleaning to a certain extent if the engine is run for a good length of time the deposits should burn off. I would kick up a fuss with Audi about the warranty, ask them to show its exclusion. Unless the DPF has become physically damaged by something you have done then they need to have it fixed as it is a result of the deficiency in their design. This is not like some damaged tyre, open to abuse by the driver, the DPF is integral to the vehicle operation and through no commission on your part it is not functioning as it should.

P0471 - Exhaust Pressure Sensor Range/Performance
I can't say for certain but the code suggests - something is restricting your exhaust or you have an exhaust leak. I would have to have more info for a possible better solution.

There is a known issue with the 2005-2007 Corolla automatic transmission shift logic. The shift points may seem harsh, and the Check Engine light may be illuminated.

There is a technical service bulletin published (TC015-07) that will address and rectify this condition.

The diagnostic code P2716 will be stored in the computer memory. The procedure involves replacing the Engine Control Module (the computer) with an updated unit.

The repair is covered, under the factory warranty, for 96 months, or 80,000 miles, which ever comes first.

I hope that this helps Corolla you out.

The Toyota Factory Warranty for the Engine Control Module (the ECM) is 8 years/80,000 miles; from the date of first use.

Your ECM should be a covered item.

This is very common on Matrix/Corollas and is repairable by way of replacement PCM to correct invalid parameters. the labor is low but the part is very expensive.

Expect approximately $89 or less in labor, and $648 for the new PCM



Reference bulletin #TC015-07

The contents are below:

TRANSMISSION & CLUTCH
TC015-07 Title:
HARSH SHIFT AND M.I.L. "ON"
DTC P2716 Models:
'05 - '07 Corolla & Matrix (1ZZ-FE) September 20, 2007

Introduction
Some 2005 - 2007 model year Corolla and Matrix vehicles equipped with an automatic transaxle may exhibit a harsh shift condition and a M.l.L. ON" with DTC P2716 stored.
Improvements have been made to the Engine Control Module (ECM) (SAE term:
Powertrain Control Module/PCM) to reduce the possibility of this condition occurring.

Applicable Vehicles
^ 2005 - 2007 model year Corolla and Matrix (2WD) vehicles equipped with the 1ZZ-FE engine.
Warranty Information
Applicable Warranty*:
This repair is covered under the Toyota Federal Emissions Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle's in-service date.

that would not be covered because it does not affect safety. the only times that a warranty applies after the standard 3yr/36k warranty is when a safety issue comes up that could affect braking, steering, glass and fire. those TSB's are just references for the technicians to point them in the right direction for repair.

Same issue.

There is a service bulletin on this. Toyota will replace computer. I have a 2007 Corolla S with 56,000 miles

There is a known issue with the 2005-2007 Corolla automatic transmission shift logic. The shift points may seem harsh, and the Check Engine light may be illuminated.

There is a technical service bulletin published (TC015-07) that will address and rectify this condition.

The diagnostic code P2716 will be stored in the computer memory. The procedure involves replacing the Engine Control Module (the computer) with an updated unit.

The repair is covered, under the factory warranty, for 96 months, or 80,000 miles, which ever comes first.

I hope that this helps you Corolla owners out.

A "FixYa" rating (4 blue diamonds) would be greatly appreciated for my assistance on your issue. Thanks in advance.

Regards,

Toyota Ed