P2108: Throttle actuator control module performance
The module that runs the throttle is not working as it should according to its own tests. Often power supply, grounds or the module itself.
| Code | P2108 |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P2108 means
The electronic accelerator is run by a control module that constantly checks everything is responding properly. This code means the throttle control module is failing those performance checks. Quite often the root cause is a poor power supply, and sometimes a faulty throttle body or the module itself.
Most common causes
- Low battery voltage, loose terminals or an alternator not charging well
- A poor engine or ECU ground
- Dirty or loose throttle body or ECU connectors
- A carboned up or worn throttle body
- The module itself has failed, which may need reprogramming or replacement
Symptoms
- Engine or throttle warning light on
- Reduced power or limp mode
- Unstable idle or jerky driving
Can you drive with P2108?
With care You can usually drive with care, though with little power and a risk of the engine dropping to forced idle. Get it to a garage soon.
Open the bonnetthe in-depth explanation
How to check it
Use a live data reader to watch battery voltage with the engine running: if it is well below the usual range (around 13.5 to 14.5 V), a charging problem may be behind the code.
How to read and clear P2108 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2108 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2104 Throttle control system: forced idle
- P2105 Throttle control system: forced engine shutdown
- P2106 Throttle control system: forced limited power
- P2107 Throttle actuator control module processor fault
- P2109 The minimum pedal position throttle or sensor A stop gives readings outside the
- P210A The throttle actuator B control motor has a broken or disconnected wire
- P210B The throttle actuator B control motor gives readings outside the normal range
- P210C The throttle actuator B control motor gives a lower signal than normal
- P2100 Throttle actuator A control motor circuit open
- P2101 Throttle actuator A control motor circuit range or performance
- P2102 Throttle actuator A control motor circuit low
- P2110 Throttle control system: forced limited RPM
What does code P2108 mean?
The electronic accelerator is run by a control module that constantly checks everything is responding properly. This code means the throttle control module is failing those performance checks. Quite often the root cause is a poor power supply, and sometimes a faulty throttle body or the module itself.
Can you drive with P2108?
You can usually drive with care, though with little power and a risk of the engine dropping to forced idle. Get it to a garage soon.
How do you clear P2108?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2108 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
