Error Code P07AE: What It Means & What To Do?

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It is the Hybrid control module of your vehicle that monitors the transmission clutch for its operation pattern. If it detects that the clutch is not working as per the command of the driver it will set error code P07AE. In order to reduce further damage, the hybrid control module ma also place the vehicle in “limp mode”, which restrains the available engine and transmission performance.

The ECM or Engine Control Module will only set this code after it has been proactively been monitoring and accordingly adjusting other sensors as well as systems for proper self-diagnosis. You will have to address this first before driving your vehicle too much to avoid further damages. There may some hidden but complex internal electrical malfunctions present too, like shorted or open circuits or wires, water intrusion, issues caused by the ATF. The letter “G” in this case refers to few different possible distinctions in terms of components. There could be an issue caused due to specific circuit/wire, or friction element within the transmission. You will have to refer your vehicles manual for all the information regarding component locations, distinctions, wiring and connector locations etc. This error code P07AE is set by the ECM module when it has detected a slip in the internal “G” friction element inside the transmission is stuck off. It also means that it is not engaging or gripping as needed or is showing performance issues.

What causes this problem with the Transmission Friction Element "G" Performance/Stuck Off?

• Low levels of ATF
• Internal friction element is work out
• Contaminants in the ATF
• Damages of the wiring i.e. open/shorted/chafed etc.
• Uneven sizes of tires
• Problems caused by uneven rotational speed/circumference
• Malfunctioning Transmission control module
• Malfunctioning Engine control module
• Damages to module and/or harness due to water

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We have drafted a list of common symptoms so that you can understand your vehicle better. Don’t panic and read the symptoms exhibited when the error code P07AE is set:

Common Symptoms

• Uneven handling
• Slipping of transmission
• Shifting becomes difficult and erratic
• Abnormal patterns of shift
• Rough shift selection
• ATF (Automatic Transmission Fluid) leaking
• Poor torque
• Atypical power output

Below are some ways with which you can correct the P07AE code:

• Repair or replace ECM
• Repair or replace Transmission
• Check and clean ATF
• Refill Transmission oil to required quantity

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Here are some steps to diagnose this P07AE fault code:

Step 1 - Research your vehicles TSB Technical Service Bulletins for the issue you are facing. Information will be very handy in diagnosing this error code. If advanced diagnostic steps are needed, you may require tools too. Refer the TSB in congruence with your vehicle’s year/make/model/engine for steps for diagnosis or corrections. Do the basic maintenance, and the first step in that would be to check the transmission oil and its quality. The ATF shouldn’t be contaminated with debris or any other particles, also it should be at the optimum level. Low ATF can cause a lot of damage to your vehicle. Following maintenance schedules is also crucial, if you don’t remember when the last one as you should do it now before proceeding. Transmissions service includes checking of the filter+fluid+gasket so do that, fix the problems and move to step 2.

Step 2 - When looking for the connector and harness you will come across a junction connector, you will also find a “master” connector. To ensure you are working with the correct one, refer your vehicles manual for the exact location. Now check if the connector is seated properly and there’s good electrical connection present. The connector is subjected to vibrations where it connects the A/T. These vibrations can cause it to become loose or even damaged. The ATF can also saturate the connectors and wires, this is not good, as it can cause issues in the future if not already.

Step 3 - Remember that systems of a vehicle work in sync with each other, issues in one can cause issues with the others. Hence, it is very important to be aware of the overall condition of your vehicle, and take it for regular maintenance checks. If you are able to spot uneven tires, worn out suspension parts, incorrect wheels, etc. fix these issues.

Common mistakes when diagnosing the P07AE code

• Internal transmission has failed
• Transmission fluid level is lower than required
• Transmission valve body solenoid has failed