P081C

Park Input Circuit

Q: Is it safe to drive with P081C?

Once running, the car generally drives fine, but because this signal ties into the neutral-safety start circuit you could get a no-crank until it confirms Park or Neutral. Fix it before it leaves you stranded.

Q: Can I just clear P081C?

It will clear, but returns once the module sees the bad park signal again unless the switch or wiring is repaired.

Transmission / range input Generic OBD-II Medium

What it means

P081C means the transmission control module detected a problem with the park input circuit — the switch or sensor signal that confirms the transmission is in Park. Because that signal often feeds the gear-position display and the neutral-safety start circuit, a fault can upset the PRNDL readout and, on some vehicles, prevent the engine from cranking until Park or Neutral is confirmed.

Medium

Can I keep driving? Usually drivable, but on some vehicles the engine may refuse to crank unless the switch confirms Park or Neutral. Get it fixed to avoid a no-start.

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

Check-engine light on
No-crank unless the shifter is nudged in Park or Neutral
Wrong or missing gear-position (PRNDL) display
Shift-interlock trouble releasing out of Park

Common causes

Most likely first

Faulty park input switch or sensorLikely
Damaged, open, shorted, or corroded wiring in the park input circuitCommon
Corrosion or loose pins in the switch connectorCommon
Misadjusted park/neutral switchLess often
Failed transmission control module (TCM)Less often

How to diagnose & fix

Work through it in order

Scan for codes and read freeze-frame data to confirm the fault.
Inspect the park input switch wiring and connector for damage, corrosion, or loose pins.
Test the park signal as the shifter is moved into and out of Park, and check switch adjustment.
Replace the park input switch/sensor if it doesn't signal correctly.
If the switch and wiring are good, suspect the range circuit or TCM. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P081C?+

Once running, the car generally drives fine, but because this signal ties into the neutral-safety start circuit you could get a no-crank until it confirms Park or Neutral. Fix it before it leaves you stranded.

Can I just clear P081C?+

It will clear, but returns once the module sees the bad park signal again unless the switch or wiring is repaired.

Read & clear P081C 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