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 P171C: General Description
The park pawl actuator driver unit controls the park pawl actuator to switch to and unlock the P position by the command from the powertrain control module (PCM). When the switch/unlock action to the P position is completed, the P position detected by the park pawl actuator driver unit and the P position detected by the park position sensor transmitted from the PCM are compared, and if the information of the P position differs, the PCM receives malfunction from the park pawl actuator driver unit and stores a DTC.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.