P0725
PowertrainTransmissionmoderate severityEngine Speed Input Circuit Malfunction
What P0725 Means
The transmission controller is not receiving a valid engine speed signal. This RPM input is needed to calculate proper shift points and lockup.
Symptoms
- Harsh or erratic shifting
- Torque converter lockup problems
- Check engine light on
Common Causes
- Faulty engine speed sensor
- Wiring fault to TCM
- Corroded connector
- Faulty PCM/TCM
Diagnostic Steps
- Scan codes and freeze frame data
- Compare engine RPM at PCM and TCM
- Inspect wiring and connectors
- Repair circuit or replace sensor
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Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
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Serious DIY~$100
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Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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