P0725 on Nissan: How to Diagnose & Fix
Engine Speed Input Circuit Malfunction
1 Nissan model · 1 documented issue · $150-$600 repair
P0725 on Nissan by model: symptoms, diagnosis and fix
Altimas in this period frequently suffer from failing crankshaft position sensors and camshaft position sensors, especially on the 2.5L and 3.5L engines. Owners report intermittent stalling at stops or while driving, extended cranking, sudden no-start conditions, and check-engine lights. Nissan issued service information and many owner reports describe repeat failures with cheap aftermarket sensors.
Common Symptoms
- engine stalls while driving
- intermittent no-start
- long crank time
- tachometer drops to zero
- check engine light
- hard restart when hot
How to Fix
Diagnosis includes scanning for correlation and sensor circuit codes, checking live RPM signal during cranking, and inspecting harness connectors for oil contamination or heat damage. The most reliable fix is replacing the failed sensor(s) with OEM-quality parts and clearing codes; in some cases both cam and crank sensors are replaced together due to similar age and failure patterns.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan 23731-6N21A crankshaft position sensor
2002-2006 Nissan Altima 2.5L QR25DE; confirm VIN, DTC and sensor location because catalog terminology can overlap cam/crank/magnet sensor names.
- OEM Nissan 2002-2006 Altima 3.5L camshaft position sensor
2002-2006 Nissan Altima 3.5L VQ35DE; select the DTC-identified bank/side and verify current Nissan part number.
- Genuine Nissan 23731-JA00C crankshaft/magnet sensor
Confirm VIN, DTC and sensor location.
- Genuine Nissan 23731-JA11B camshaft position sensor
Verify VIN, DTC and location; do not infer quantity.
- Genuine Nissan 23731-JA10C crankshaft position sensor
2007-2012 Nissan Altima 3.5L VQ35DE for this card; confirm VIN, exact DTC and crank-sensor location.
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Owner tips & cautions
- TipUse OEM or OEM-supplier sensors; many owners report repeat failures within months when using the cheapest aftermarket cam/crank sensors.
- TipIf one sensor fails on a high-mileage car, many owners proactively replace the matching cam/crank sensors together to avoid another breakdown soon after.
P0725 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0725 mean on a Nissan?
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. On Nissan it is documented across 1 model: Altima.
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 on a Nissan?
Published repair estimates on Nissan range from $150 to $600 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0725 on a different make?
View P0725 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.