April 10, 2026

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What does code P2116 mean?

A P2116 trouble code indicates a problem with the maximum stop performance of throttle or accelerator pedal position sensor “B.”

In simple terms, the PCM is not seeing the correct fully open (maximum) position from the throttle or pedal sensor. This can affect how the engine responds when you press the accelerator.

👉 Need help understanding PCM failures? Start here: What Does an ECM Do in a Car?

Common symptoms of a P2116 code

• Reduced engine power
• Poor acceleration
• Limited throttle response
• Vehicle may enter limp mode
• Check engine light on
• Hesitation during acceleration
• Engine may not reach higher RPMs

What can cause a P2116 code?

• Faulty throttle position sensor (Sensor B)
• Accelerator pedal position sensor issues
• Dirty or sticking throttle body
• Carbon buildup restricting movement
• Wiring or connector problems
• Sensor calibration issues
• PCM-related faults in some cases

This code is usually related to sensor range and throttle movement issues.

Is P2116 serious?

It can be. While the vehicle may still run, it may not accelerate properly or reach full power, which can make driving difficult and unsafe in certain situations.

How is P2116 diagnosed?

• Scan for additional trouble codes
• Inspect throttle body for buildup
• Check throttle plate movement
• Test throttle and pedal position sensors
• Inspect wiring and connectors
• Verify PCM inputs and outputs

This code requires checking both sensor signals and throttle movement.

How do you fix a P2116 code?

• Clean the throttle body
• Repair or replace faulty sensors
• Fix wiring or connector issues
• Perform throttle relearn procedures
• Address airflow-related problems
• Test and repair PCM-related issues if necessary

Many cases can be resolved with cleaning and recalibration.

Can a bad PCM cause a P2116 code?

Yes, although less common. The PCM monitors throttle position and compares sensor readings. If it cannot properly process the signals, it may trigger a P2116 code.

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👉 Read more PCM symptoms and warning signs

🧠 Final Thoughts

The P2116 code indicates the system is not detecting the correct maximum throttle position, which can limit engine power and acceleration. While it may seem minor, it can significantly impact performance.

👉 Fixing the issue early helps restore full throttle operation and ensures smooth, reliable driving.

👉 Still dealing with a P2116 code? Start your repair here

🔗 Related Trouble Codes You Should Check

If you're diagnosing a P2116 code, you may also want to check:

👉 P2101 Code  
👉 P0607 Code  
👉 U0100 Code

🔗 Related PCM & ECM Guides

👉 7 Symptoms of a Bad PCM

👉 How Much Does PCM Repair Cost?

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