P0725: Engine Speed Input Circuit Malfunction
4 vehicles · 3 makes · $150-$1,200 repair
Most Reported On
P0725 is an OBD-II diagnostic trouble code meaning “Engine Speed Input Circuit Malfunction.” This generic powertrain code means the transmission control module or PCM is not receiving a reliable, rational engine-speed (or input/turbine) signal from its speed sensor. The computer compares this rotational-speed input against other sensors to manage shift timing and torque converter lockup, and it sets the code when that signal goes missing, drops out, or reads illogically. It usually points to a sensor or wiring problem in the speed-input circuit rather than an engine failure itself. This code is most commonly reported on 2006-2010 Infiniti M35, 2003-2012 Infiniti FX35, and 2002-2012 Nissan Altima, plus 1 other vehicle, with repair costs ranging from $150 to $1,200.
Common Causes
Typical Repair Cost
Based on 4 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0725.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (4)
FAQ
What does P0725 mean?
P0725 stands for "Engine Speed Input Circuit Malfunction." This generic powertrain code means the transmission control module or PCM is not receiving a reliable, rational engine-speed (or input/turbine) signal from its speed sensor. The computer compares this rotational-speed input against other sensors to manage shift timing and torque converter lockup, and it sets the code when that signal goes missing, drops out, or reads illogically. It usually points to a sensor or wiring problem in the speed-input circuit rather than an engine failure itself.
What are the most common causes of P0725?
The most common causes of P0725 are: Faulty engine/input speed sensor, Damaged, corroded, or loose sensor wiring or connector, Low or dirty transmission fluid, Open or shorted circuit between sensor and PCM/TCM, Poor ground or power supply to the sensor, Internal transmission damage affecting the sensor, Faulty PCM/TCM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0725?
Repair costs for P0725 range from $150 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by P0725?
Au7o has documented P0725 across 4 vehicle models from 3 manufacturers: Fiat, Infiniti, Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.