P07A3 OBD-II: Transmission Friction Element "A" Stuck On

P07A3 Severity

Urgent

Should you fix P07A3 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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What causes OBD-II fault code P07A3?

The Hybrid Control Module monitors the transmission clutch for proper operation. If the Control Module detects the clutch is not releasing as commanded, code P07A3 will be set. The hybrid control module may also place the vehicle in "limp home", limiting available engine/transmission performance to prevent additional damage.

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OBD II Fault Code

  • OBD II P07A3

OBD-II Code Transmission may not shift properly is defined as a Transmission Friction Element "A" Stuck On

The Hybrid Control Module monitors the transmission clutch for proper operation. If the Control Module detects the clutch is not releasing as commanded, code P07A3 will be set. The hybrid control module may also place the vehicle in "limp home", limiting available engine/transmission performance to prevent additional damage.

Transmission may not shift properly Symptoms

  • Engine may enter limp home mode (reduced performance)
  • Transmission may not shift properly

Common Problems That Trigger the P07A3 Code

  • Internal transmission failure
  • Transmission fluid level is low
  • Transmission valve body solenoid failure
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