P2109 OBD-II Trouble Code: Throttle/Pedal Position Sensor "A" Minimum Stop Performance

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2109 code

P2109 is a diagnostic trouble code (DTC) for "Throttle/Pedal Position Sensor "A" Minimum Stop Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P2109 DIAGNOSTIC Get a fair and transparent estimate upfront

P2109 code definition

P2019 is a general OBD-II trouble code indicating a fault with the throttle / pedal position sensor “A” minimum stop performance. This code may be seen with other throttle or pedal sensor codes.

What the P2109 code means

The engine control module (ECM) uses the throttle and pedal position sensor inputs to control the throttle actuator motor. The throttle actuator motor is commanded by the ECM to open and close the throttle plate as needed allowing air into the intake.

When a stop performance is detected with the sensor “A” the P2019 code is set. When P2019 is set, it causes the Check Engine Light to be seen on the dashboard and a failsafe mode to be set. The failsafe mode will remain until the fault is resolved or normal operation is found.

What causes the P2109 code?

Many different components can cause the P2109 code:

  • Failed electronic throttle body
  • Throttle actuator control motor failure
  • Pedal or throttle position sensor has failed
  • ECM that is failing or has failed
  • Open or short in the wiring harness
  • Throttle plate can not move

What are the symptoms of the P2109 code?

Common symptoms of the P2109 code are:

  • Check Engine Light triggered
  • Lack of felt power
  • Engine misfire condition
  • Vehicle stalling while running or upon start up
  • Vehicle may have no throttle operation

How does a mechanic diagnose the P2109 code?

A mechanic will begin by checking for all codes stored in the ECM, which means pending codes and history codes as well. These codes, as well as their freeze frame data, will be noted for later use. Now, all the codes will be cleared for a clean slate.

Next, a test drive will be performed under similar conditions as the freeze frame data if possible. Once returning from the test drive, a visual inspection will be done to look for any obvious signs of damage or broken components.

Next, the scan tool will be used to monitor the throttle and pedal sensor readings while the throttle is operated. The technician will then check for voltage at the throttle actuator. If voltage is present, the air intake tube will be removed to check if the throttle plate is capable of operating. Lastly, the ECM will be tested as needed.

Common mistakes when diagnosing the P2109 code

The most common mistake is a failure to perform steps in the proper order or skipping steps completely. When this happens, it can lead to simple things being missed which wastes time and money and can cause good components to be replaced.

How serious is the P2109 code?

The P2109 code can have some rather serious side effects, with the chief of these issues being the vehicle not moving while pressing the throttle. This is due to a failsafe mode that is enabled when the fault is detected and done to protect the vehicle. P2109 should be repaired as soon as possible.

What repairs can fix the P2109 code?

A wide array of repairs can fix the P2109 code:

Additional comments for consideration regarding the P2109 code

An advanced level scan tool is critical for diagnosing the P2019 code. These allow the technicians to view the data stream found in the ECM. The data stream shows live sensor readouts and shows the changes in values over time. This gives information that would otherwise be extremely difficult to obtain.

Need help with a P2109 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P2109

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2109 code.

SCHEDULE P2109 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,328)

Rating Summary
5,857
225
52
35
159
5,857
225
52
35
159

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Toyota Corolla - Check Engine Light is on - New Braunfels, Texas
As always, punctual and professional. He explains the problem thoroughly. I feel confident in his work and knowledge.

Greg

22 years of experience
86 reviews
Greg
22 years of experience
Mazda 3 - Check Engine Light is on - Queen Creek, Arizona
Greg was scheduled for 1:00 but he was able to come earlier and let us know right away. He was very thorough and spent his time going thru the entire car.

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Lincoln Aviator - Check Engine Light is on - San Antonio, Texas
Made call before appt. -courteous-knowledgeable-got part need & did prompt repair after computer check.

Claud

8 years of experience
325 reviews
Claud
8 years of experience
Chevrolet Trax - Check Engine Light is on - Grosse Pointe, Michigan
Very good experience. He arrived on time. Explained what he was going to do. Completed the work and was thorough in what I needed for my next service in plain language vs car jargon. I'm a raving fan of Claud!


More related articles

P2259 OBD-II Trouble Code: Secondary Air Injection System Control B Circuit Low
P2259 P2259 code definition Secondary Air Injection System Control B Circuit Low What the P2259 code means P2259 is an OBD-II generic code. The engine control module (ECM) monitors the secondary air injection system control valve circuit when the system...
P2432 OBD-II Trouble Code: Secondary Air Injection System Air Flow/Pressure Circuit Low Bank 1
P2432 code definition The P2432 trouble code is a generic powertrain code related to the auxiliary emissions control system. This particular code...
P2562 OBD-II Trouble Code: Turbocharger Boost Control Position Sensor Circuit
P2562 Code Definition The P2562 code is a generic powertrain code related to vehicle speed control and the idle control system. It...

Related questions

Check engine light comes on and car does not start.

Let's start with your low battery issue. It sounds like something in the electrical system is staying on over night that shouldn't be. Your intermittent Check Engine Light sounds like it could be related to your idling issue. My advice...

Reading 9 different codes

Hello, and thank you for writing in. With a misfire detected on all cylinders, you need to direct your attention to a component that can cause the entire engine to struggle. Considering you have an EVAP code as well, and...

My check engine light goes on when I go up a hill or speed up then it goes off and on

If the vehicle is not overheating and the check engine light is NOT "flashing", and there are no other outward indications of the engine malfunctioning, it is safe to drive the car until it is convenient for you to request...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com