P0725: Engine Speed Input Circuit Malfunction
Can you still drive? Drive with caution. Transmission shifting will be affected and may be harsh. Have the vehicle diagnosed soon to prevent potential transmission damage.
What Does P0725 Mean?
Code P0725 means the TCM is not receiving a reliable engine RPM signal. The transmission computer needs accurate engine speed data to calculate torque converter slip, shift timing, and line pressure. This signal typically comes from the crankshaft position sensor or the ignition system, so the problem may originate outside the transmission itself.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty crankshaft position sensor
- Damaged wiring between engine and TCM
- Ignition system interference
- Faulty TCM
- Engine misfire causing erratic RPM signal
Symptoms
- Check engine light on
- Harsh or delayed shifting
- Torque converter shudder
- Transmission slipping
- Erratic tachometer readings
Diagnostic Steps
- 1Check for additional engine codes especially crankshaft sensor codes
- 2Monitor engine RPM signal at the TCM with scan tool
- 3Inspect crankshaft position sensor connector and wiring
- 4Test crankshaft position sensor output
- 5Check for ignition system faults causing RPM signal noise
- 6Verify TCM is receiving proper voltage supply
Recommended Parts & Tools
crankshaft position sensor
OBD-II scan tool
electrical connector cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $100 - $600 |
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Chat with AI About P0725Commonly Affected Vehicles
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Frequently Asked Questions
Is P0725 a transmission code or an engine code?
P0725 is technically a transmission code, but the root cause is often an engine sensor issue. The crankshaft position sensor signal is shared between the engine and transmission computers.
Why does the transmission need to know engine RPM?
The TCM uses engine RPM to calculate torque converter slip, determine optimal shift points, and set proper line pressure for smooth, reliable shifts.
Community Fix Reports
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