Check Engine Code
P0720
Output Speed Sensor Circuit Malfunction
What P0720 means
The output shaft speed sensor tells the TCM how fast the transmission output is spinning. Without a good signal, shift quality goes to pieces.
Symptoms
- CEL
- Erratic shifting
- Speedometer may read incorrectly
- Harsh engagement
Likely causes (most common first)
- Failed output speed sensor
- Damaged wiring
- Metal debris stuck to the sensor tip
- Low transmission fluid
Can I keep driving?
Medium — drivable but fix soon
Typical repair cost
DIY fixes can start near $80 (parts only). Shop repairs for P0720 typically run up to $400 depending on the underlying cause and vehicle. Start with the most common cause — Failed output speed sensor — before throwing parts at it.
Symptoms that match P0720
If you got here from a search query, one of these might describe what your car is actually doing:
Recommended parts & tools for P0720
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