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, 2002-2012 Nissan Altima, and 2003-2012 Infiniti FX35, 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
To diagnose P0725, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all 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 diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
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.
Sources (4)
- NHTSANHTSA complaints for Infiniti M35 involving camshaft/crankshaft sensor stalling
- NHTSANHTSA complaints mentioning stalling and cam/crank sensor faults on Infiniti FX35
- article[Recall] Fiat convoca 11,6 mil unidades por problema no câmbio (Autopapo, 2019)
- articleCâmbio Dualogic/GSR: conheça os principais códigos de falha DTC (O Mecânico)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.