P081D

Neutral Input Circuit

Q: Is it safe to drive with P081D?

Driving may be possible, but this signal feeds the neutral-safety interlock, so the engine may not start. Get it diagnosed promptly.

Q: Can I just clear P081D?

The fault returns while the circuit or switch is bad. Repair the switch or wiring before clearing.

Transmission Generic OBD-II Medium

What it means

P081D flags a fault in the neutral input circuit — the signal that tells the vehicle the selector is in Neutral. This input feeds the start interlock and gear-position logic, so a bad signal can affect starting and shift behavior. It's usually caused by a faulty neutral/range switch, wiring or connector problems, or a misadjusted shift linkage.

Medium

Can I keep driving? Possibly, but the engine may not start due to the neutral-safety interlock; get it diagnosed promptly.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Gear-position indicator wrong or missing
May not start (neutral-safety interlock) or starts only in certain ranges
Erratic shift behavior
Check-engine or transmission warning light on

Common causes

Most likely first

Faulty neutral position switch/sensorLikely
Open, short, or corroded wiring and connectorCommon
Misadjusted shift linkage or switchCommon
Failed transmission range switchLess often
Transmission control module fault (less common)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and note any companion range-switch codes.
Inspect the neutral/range switch connector and wiring for opens, shorts, or corrosion.
Verify the switch and shift-linkage adjustment.
Test switch continuity in Neutral versus the other ranges.
Replace the neutral position switch/sensor if it fails testing.

FAQ

Quick answers

Is it safe to drive with P081D?+

Driving may be possible, but this signal feeds the neutral-safety interlock, so the engine may not start. Get it diagnosed promptly.

Can I just clear P081D?+

The fault returns while the circuit or switch is bad. Repair the switch or wiring before clearing.

Read & clear P081D yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX