Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P170F: General Description
The park pawl actuator driver unit controls the park pawl actuator to switch to and unlock the P position. The park pawl actuator driver unit normally uses two lines (F-CAN A_H and F-CAN A_L) to receive switch/unlock commands for the P position and transmit/receive a feedback signal between the powertrain control module (PCM) and itself. If the communication cannot be done with the F-CAN, the communication is substituted by the PWM communication which has the switch/unlock communication line (PARKCMD) and the feedback signal communication line (PARKBUSY). The PCM and the park pawl actuator driver unit monitor the PWM communication, and if the park pawl actuator driver unit transmits/receives any signals via the PWM communication or the received signal is abnormal for a specified time, the PCM receives a malfunction from the park pawl actuator driver unit and stores a DTC.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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