DTC P0850: Neutral Switch Input Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Powertrain Control Module (PCM) does not detects a change in neutral switch voltage when vehicle is driven at speeds of less than 16 MPH. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- Clutch switch malfunction.
- Short or open circuit between neutral switch and PCM.