U0606 code meaning
Lost Communication With Throttle/Pedal Position Sensor/Switch A
Network system Generic code U06xx codes Check engine light
What U0606 means
Many electronic throttle bodies now report the blade angle as digital SENT frames (SAE J2716) instead of two analog voltages. U0606 means the engine controller no longer receives valid frames from position sensor A. Ford's gasoline summaries for 2020 to 2024 use it on SENT throttle bodies: a wiring fault or a faulted SENT device lasting over 4 s lights the MIL and the wrench lamp, while a line shorted low or high gets separate codes and P0120 covers a sensor that still talks but flags itself faulty. GM's 2025 tables (25OBDG03A) name it throttle position sensor 1 and fail it as Type A for line levels under 0.5 V or over 4.1 V, wrong pulse timing, stale messages or CRC errors. Throttle authority is then cut back.
U0606 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0606
- Check engine light, on Ford also the wrench lamp
- Reduced power or limp mode with limited throttle response
- Rough or unstable idle
Common causes of U0606
- Most likelySENT signal, 5 V supply or ground wire to the throttle body open, shorted or chafed
- PossibleLoose, corroded or water-soaked throttle body connector
- PossibleSensor electronics in the throttle body failed (replacement usually as a complete throttle body)
- Less likelyEngine controller SENT input or software fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle pedal sensor aSensor wiring
What each part of U0606 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 06 | The exact fault in that area. |
What to do next
- Note U0606 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0606
What does U0606 mean?
U0606 means "Lost Communication With Throttle/Pedal Position Sensor/Switch A". Many electronic throttle bodies now report the blade angle as digital SENT frames (SAE J2716) instead of two analog voltages. It is a generic code, so it means the same on every make.
Is it safe to drive with U0606?
Drive gently and only to a workshop. With U0606 the car can go into limp mode (reduced power) to protect itself.
Will U0606 fail an emissions test?
Yes, it can. U0606 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0606 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0606 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.