P0725 Code: Engine Speed Input Circuit
🟠 Moderate severity · drivable
You can drive, but shifting may be delayed, harsh, or not happen at all until the signal problem is fixed.
What P0725 means
The transmission computer isn't receiving a valid engine RPM (speed) signal. It uses engine speed together with transmission speed sensors to decide when to shift. Without it, shifting may be delayed, harsh, or stop working, and the transmission may go into fail-safe mode.
Symptoms
- Check engine light is on
- Harsh or delayed shifts
- Transmission won't shift or goes into fail-safe mode
- Engine may stall at times
Common causes
- most common: Damaged wiring in the engine speed signal circuit
- common: Faulty crankshaft position sensor
- common: Loose or corroded connector
- less common: Poor ground connection
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect wiring and connectors in the engine speed circuit | Yes | $20–60 |
| Test and replace the crankshaft position sensor if faulty | Yes | $50–150 |
| Repair damaged wiring or connector | Mechanic | $100–300 |
Frequently asked questions
Can I drive with a P0725 code?
Yes, but the transmission may shift harshly, delay shifts, or refuse to shift. If it goes into fail-safe mode, get it diagnosed before driving far.
What does the engine speed input circuit do?
It sends the engine RPM reading to the transmission computer. The computer uses engine speed with the transmission speed sensors to decide when to shift gears.
How much does it cost to fix a P0725?
If a crankshaft position sensor is at fault, expect $50–$150 for the part plus labor. Wiring repairs are usually $100–$300.
Related codes
P0726
P0726 Code: Engine Speed Input Circuit Range/Performance
P0727P0727 Code: Engine Speed Input Circuit No Signal
P0335P0335 Code: Crankshaft Position Sensor Circuit Malfunction
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.