P0850 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0850 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0850 code.

What Does P0850 Code Mean?

OBD-II Code P0850 is defined as a Park/Neutral Switch Input Circuit

The engine computer (PCM) needs to know when the transmission is in Park/Neutral, as this is required before the vehicle can safely be started. The PCM depends on the park/neutral safety switch to communicate when the transmission is in Park/Neutral. If the Park/Neutral Safety Switch fails to operate properly, code P0850 will be set. The engine may be disabled from starting.

P0850 Symptoms

• Engine may not start

Common Problems That Trigger the P0850 Code

• Neutral safety switch failure
• Powertrain Control Module (PCM) failure
• Wiring issue