What it means
The minimum stop signal from throttle/pedal position sensor C is out of specification during initialization. Used on systems with three redundant sensor channels for safety-critical drive-by-wire control.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
This code is titled for throttle or pedal position sensor F, one of the redundant position channels used by some drive-by-wire systems. P2117 sets when the module sees that channel’s minimum-stop signal outside its expected range during initialization; verify the vehicle’s service information because sensor-channel naming and system layout vary.
Common causes
Most likely first.
- Internal pedal sensor fault
- Corroded connector pins
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
How to diagnose it
- Check the vehicle’s service information to locate sensor F and confirm which throttle or pedal assembly it belongs to, then record freeze-frame data and related position codes.
- Inspect sensor F’s connector and harness for corroded pins, looseness, moisture, or wiring damage, with particular attention to the connector area.
- Use a scan tool to compare sensor F’s minimum reading with the other redundant channels during key-on initialization and slow pedal movement.
- Test sensor F’s reference, ground, and signal circuits against the manufacturer’s specification, checking for intermittent contact or a signal outside the expected range.
- If the circuit is sound, inspect the associated pedal or throttle mechanism for binding and test the sensor or actuator assembly according to the vehicle maker’s procedure.
Common fixes
- Clean and secure corroded or loose sensor F connector pins, and repair damaged wiring.
- Replace the faulty sensor F or its pedal/throttle assembly if its signal fails testing.
- Correct mechanical binding that prevents the assembly reaching its minimum position.
- Repair the actuator or control module only if testing confirms the fault is there.
Can I keep driving?
Because this fault involves a redundant drive-by-wire position channel, the vehicle may limit power or enter limp mode. Avoid driving if throttle response is restricted or unpredictable; arrange help if safe control is in doubt.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.