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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA201886 GT, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - DIAGNOSTIC CODES (4 OF 6)SFI SYSTEMDTC P0851: PARK / NEUTRAL SWITCH INPUT CIRCUIT LOW; DTC P0852: PARK / NEUTRAL SWITCH INPUT CIRCUIT HIGH [12/2017 - 07/2018]MONITOR STRATEGY
2018 Toyota 86 GT, Standard Trans
Monitor Strategy
2018 Toyota 86 GT, Standard TransSECTION Monitor Strategy
| Related DTCs | P0851: Neutral position switch circuit continuity (Low voltage) P0852: Neutral position switch circuit continuity (High voltage) |
| Required Sensors/Components (Main) | Neutral position switch Park/neutral position switch assembly |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Once per driving cycle: for manual transmission Continuous: for automatic transmission |
| Duration | 1 count: for manual transmission 6.4 seconds: for automatic transmission |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.