Cause
Throttle or pedal relearn procedure not carried out
A throttle body or pedal assembly that has been cleaned, disturbed or replaced without the module being taught its new mechanical limits. The part is fine and the fitting is fine; what is missing is the step that tells the module where the stops now are — and until it is done, the module compares live readings against limits belonging to the old assembly.
It produces genuine codes about a healthy system, which is what makes it worth naming. Minimum and maximum stop performance codes are the module observing that the sensor's endpoints no longer sit where it learned them. A cleaned throttle body is the commonest trigger, because removing carbon changes exactly the closed position the module had adapted to over years.
Two practical points. Clearing the codes is not the procedure — the learned values persist, so the codes return within a few drive cycles and the fault looks intermittent. And the procedure is specific: some vehicles relearn automatically over a defined key and idle cycle, others require a scan tool to command it, and doing the wrong one leaves the adaptation untouched. Look it up for the vehicle rather than assuming the ignition-cycle ritual works; it does on some and does nothing at all on others.
Typically an easy fix. Often worth checking before paying anyone to look.
Some of these codes mean you should stop driving
4 of the 16 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (16)
Codes where this is a likely explanation first, rather than merely a possible one.
- P2109 Throttle/Pedal Position Sensor A Minimum Stop Performance Likely for this code Moderate
- P2113 Throttle/Pedal Position Sensor B Minimum Stop Performance Likely for this code Moderate
- P2119 Throttle Actuator A Control Throttle Body Range/Performance Likely for this code Stop driving High
- P2163 Throttle/Pedal Position Sensor A/B Maximum Stop Performance Likely for this code High
- P2164 Throttle/Pedal Position Sensor B Maximum Stop Performance Likely for this code Moderate
- U0308 Software Incompatibility With Throttle Actuator Control Module Likely for this code High
- U0408 Invalid Data Received From Throttle Actuator A Control Module Likely for this code High
- P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Stop driving High
- P0221 Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Stop driving High
- P0226 Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance Stop driving High
- P2114 Throttle/Pedal Position Sensor C Minimum Stop Performance Moderate
- P2115 Throttle/Pedal Position Sensor D Minimum Stop Performance Moderate
- P2165 Throttle/Pedal Position Sensor C Maximum Stop Performance Moderate
- P2166 Throttle/Pedal Position Sensor D Maximum Stop Performance Moderate
- P2167 Throttle/Pedal Position Sensor E Maximum Stop Performance Moderate
- P2168 Throttle/Pedal Position Sensor F Maximum Stop Performance Moderate
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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