What it means
The transmission range control A circuit response is outside the expected range or performance. The code does not identify a particular actuator design or failed part.
At a glance
- Usually lights the check-engine light
How it works
The transmission control module monitors how transmission range control A responds to its command. P07E9 sets when that response is outside the expected performance range, which can reflect an electrical, actuator, or mechanical problem without identifying one specific failed part.
Common causes
Most likely first.
- Range control actuator sticking or malfunctioning
- Open, shorted, or high-resistance wiring
- Loose or corroded connector
- Mechanical binding in the range mechanism
- Control module circuit fault
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Record freeze-frame data and compare commanded and reported range-control A values to identify the conditions when the response fell outside the expected range.
- Inspect the range-control A connector and harness for looseness, corrosion, chafing, or other damage that could cause an intermittent or resistive connection.
- Check the range mechanism for binding and confirm that selector movement corresponds to the reported range.
- Use the manufacturer's diagnostic procedure to test range-control A wiring for opens, shorts, and excessive resistance.
- If the circuit checks pass, test actuator response and module inputs or outputs as specified by the manufacturer before replacing components.
Common fixes
- Clean and secure a loose or corroded range-control A connector.
- Repair chafed, open, or shorted wiring in the range-control A circuit.
- Correct mechanical binding in the range mechanism.
- Repair or replace a range-control actuator confirmed to respond incorrectly.
- Repair a confirmed control-module circuit fault.
Can I keep driving?
Limit driving if shifts are harsh, delayed, or missing, and stop if the transmission slips or cannot hold the selected range. Continued operation with an incorrect range-control response can lead to loss of drive or further transmission damage.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.