P0722 Fault Code in Hyundai: Causes, Symptoms, and Fixes

P0722 indicates that the Transmission Control Module (TCM) is not receiving a signal from the output speed sensor. This sensor monitors the rotational speed of the transmission’s output shaft, which helps the TCM manage gear shifting and vehicle speed calculations.

Common Symptoms:

1. Check Engine Light (CEL) ON
2. Transmission stuck in one gear or limp mode
3. Erratic or no speedometer reading
4. Harsh or delayed gear shifts
5. Poor fuel efficiency

Possible Causes:

1. Completely failed output speed sensor
2. Broken or disconnected wiring/connector at the sensor
3. Damaged tone ring or reluctor wheel (if equipped)
4. Faulty TCM or ECM
5. Internal transmission issues

Recommended Fixes:

1. Check and replace the output speed sensor if it’s dead.
2. Inspect wiring and connector for breaks, corrosion, or loose pins.
3. Use a scanner to confirm if the sensor is giving live data.
4. Inspect the reluctor wheel for damage (if applicable).
5. If everything checks out, check TCM/ECM function or perform software updates.

Common in Vehicles:

This fault is common in automatic transmissions across many vehicles such as:
1. Hyundai/Kia (A4CF/A5GF1 transmissions)
2. Honda (esp. Accord, Civic, CR-V)
3. Toyota (Corolla, Camry)
4. Volkswagen/Audi (Tiptronic)
5. Ford/Mazda (especially older models)