U0608 code meaning
Lost Communication With Throttle/Pedal Position Sensor/Switch C
Network system Generic code U06xx codes Check engine light
What U0608 means
Sensor C usually belongs to a second throttle body, as on engines with one throttle per bank or two throttles in parallel. Ford's 2020 to 2024 gasoline summaries spell this out: on dual-throttle applications the SENT sensor of throttle body B reports as sensor C, and U0608 sets with MIL and wrench lamp when wiring or the SENT device has been faulty for more than 4 s. P0225 and P0229 cover a self-reported fault or a brief dropout of the same sensor; oddly, Ford labels the matching shorted-line codes as sensor B. GM's dual-throttle calibration of 2023 and 2024 assigns U0608 to sensor 1 of the bank 2 throttle, 0.13 s, one trip, while that unit's second track reports as U0688. Losing one throttle forces the controller to limit both banks.
U0608 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0608
- Check engine light and, on Ford, wrench lamp
- Reduced power, uneven running between banks
Common causes of U0608
- Most likelyWiring fault on the SENT harness branch to the second throttle body
- PossiblePosition sensor electronics of the second throttle body failed
- PossibleCorroded or loose connector at throttle body B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle pedal sensor cSensor wiring
What each part of U0608 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 08 | The exact fault in that area. |
What to do next
- Note U0608 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 U0608
What does U0608 mean?
U0608 means "Lost Communication With Throttle/Pedal Position Sensor/Switch C". Sensor C usually belongs to a second throttle body, as on engines with one throttle per bank or two throttles in parallel. It is a generic code, so it means the same on every make.
Is it safe to drive with U0608?
Drive gently and only to a workshop. With U0608 the car can go into limp mode (reduced power) to protect itself.
Will U0608 fail an emissions test?
Yes, it can. U0608 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 U0608 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0608 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.