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DTC Code P0725: Engine Speed Input Malfunction – Full Guide to Fixing It
21 Jun,2025
DTC P0725 shows that your ECU or TCM isn’t receiving a valid engine speed (RPM) signal. This affects gear shifting and drive performance. Learn how to fix it with quality parts from nayapurnaonline.com — including sensors, wiring, and engine components.
❓ What Is Code P0725?
P0725 – Engine Speed Input Circuit Malfunction
This means your car’s ECU or Transmission Control Module (TCM) is not getting accurate RPM signals from the crankshaft position sensor. Without this data, shifting and throttle control may fail.
⚠️ Symptoms of P0725
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🚨 Check Engine Light
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🛑 Gear slipping or won’t shift
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🚗 Rough or jerky driving
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📉 Poor acceleration
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🔁 May crank but not start
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⚡ Speedometer drop or no RPM display
🔍 Causes of P0725
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🧲 Bad Crankshaft Position Sensor (CKP)
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🔌 Damaged or unplugged sensor wiring
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🧠 ECU or TCM fault
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💦 Water/dust in connectors
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⚙️ Faulty transmission speed sensor
🛠️ How to Fix Code P0725
✅ 1. Replace Crankshaft Position Sensor
Most common fix for Tata, Hyundai & Honda
👉 Buy Crankshaft Sensors →
✅ 2. Check Wiring & Connector Pins
Inspect the crankshaft sensor harness for rust, cracks, or disconnects.
✅ 3. Check Transmission Sensor if Auto
Sometimes TCM faults are triggered by VSS input.
👉 Transmission & Gearbox Parts →
✅ 4. Scan ECU & Clear Code
Use a scanner to check for P0335, P0720, or other companion codes.
✅ 5. Replace Damaged Engine Components
If CKP sensor is damaged due to wear or oil leakage.
👉 Engine Components & Assemblies →
🛒 Best-Selling Parts at nayapurnaonline.com
🚗 Common Cars with P0725 Fault
| Brand | Common Models | Likely Cause |
|---|---|---|
| Tata | Nexon, Altroz, Tiago | CKP sensor or harness |
| Hyundai | i20, Verna, Grand i10 | Sensor wiring or TCM signal |
| Honda | City, Amaze, Jazz | CKP failure or loose connector |
💡 Prevention Tips
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Replace crank sensors every 70,000–100,000 km
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Avoid water jet washing near engine wiring
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Always use genuine or OEM parts
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Regularly check engine harness clips and sockets
✅ Final Words
Code P0725 can affect how your vehicle shifts, starts, or accelerates. Whether it’s a sensor or circuit issue, it can be fixed with the right diagnosis and quality parts from nayapurnaonline.com.
