OBD-II code · Powertrain (generic)
P0727 Engine Speed Input Circuit No Signal
The transmission control module receives no engine speed signal. Required to coordinate shifts and torque converter lockup with engine state.
Is it safe to drive with P0727?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySpeed signal lost on data bus
- PossibleBus communication fault
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Tcm, Ecm, Canbus
Related codes
- P0335Crankshaft Position Sensor "A" Circuit Malfunction
- P0700Transmission Control System Malfunction
- P0724Brake Switch B Circuit High
- P0725Engine Speed Input Circuit
- P0726Engine Speed Input Circuit Range or Performance
- P0728Engine Speed Input Circuit Intermittent
- P0729Gear 6 Incorrect Ratio
- P072AStuck in Neutral
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.