How to Diagnose and Fix Honda Accord Throttle Position Sensor Problems

The Honda Accord Throttle Position Sensor (TPS) is an important component of the vehicle’s fuel injection system. It is responsible for monitoring the throttle’s position and sending a signal to the engine control unit (ECU) so that it can adjust the fuel/air mixture accordingly. Unfortunately, due to its placement in the engine bay, this sensor is prone to wear and tear over time, leading to a variety of problems. These can include rough idle, stalling, hesitation when accelerating, poor fuel economy and even engine misfires. If you’re experiencing any of these issues with your Honda Accord, it could be a sign that you need to replace your TPS. Fortunately, this is a relatively straightforward procedure and can be completed in just a few steps.

Automobiles are an integral part of modern life, and with them come a variety of components and systems that keep them running properly. One such component is the throttle position sensor (TPS). This is an important part of the vehicle’s engine management system, and it helps to provide the driver with the best performance possible.


A throttle position sensor (TPS) is an electronic device that measures the position of the throttle in an automobile. It is located on the butterfly spindle/shaft so that it can directly monitor the position of the throttle. The TPS provides feedback to the computer, which adjusts various engine functions such as fuel injection, ignition timing, and other parameters to ensure optimal engine performance.


The TPS consists of two main components: a potentiometer and a Hall Effect device. The potentiometer measures how far open or closed the throttle is and sends this information to the Hall Effect device, which then sends a signal to the Engine Control Unit (ECU). The ECU then uses this data to adjust various engine functions accordingly.


The main components of a throttle position sensor include:
– Potentiometer: This measures how far open or closed the throttle is and sends this information to the ECU.
– Hall Effect Device: This converts the information from the potentiometer into an electrical signal for use by the ECU.
– Wiring Harness: This connects all of these components to each other and allows them to communicate with one another.
– Mounting Bracket: This holds all of these components in place and prevents them from becoming damaged while in use.

How Does a Throttle Position Sensor Work?

The TPS works by measuring how far open or closed the butterfly valve in your car’s intake manifold is at any given time. As you press down on your accelerator pedal, this valve opens up further, allowing more air into your engine which increases its power output accordingly. Conversely, when you release your foot off of your accelerator pedal, this valve closes back up again decreasing your car’s power output as well as its fuel consumption.

The TPS monitors this movement closely and sends signals back to your car’s ECU based on how far open or closed it is at any given moment in time. Your car’s ECU then uses this data to adjust various parameters such as fuel injection timing, ignition timing, etc., in order to ensure optimal performance from your car’s engine at all times regardless of what type of driving conditions you may be experiencing at any given moment in time.

Signals To ECU

When it comes to sending signals back to your car’s ECU about how far open or closed its butterfly valve is at any given moment in time, there are two different types of signals that are sent by your TPS depending on what type of vehicle you have; either analog or digital signals can be used depending on your specific make/model/year vehicle configuration/specifications/requirements etc..

Analog signals are sent by most older model cars while digital signals are sent by most newer model cars due to their increased accuracy & precision when compared against analog signals; regardless though – both types signal back information about how far open or closed its butterfly valve is at any given moment & then relays this information back up towards its respective car’s ECU for further processing & necessary actions taken accordingly if needed be..


When it comes down to measuring & monitoring just how much airflow comes through its respective butterfly valve – modern day TPS units are incredibly sensitive & precise when doing so! They can measure airflow down even single digit percentages accurately & reliably without fail; this makes them incredibly useful when it comes down towards optimizing performance within modern day engines regardless if they have turbochargers installed inside them or not!

Symptoms Of A Bad Throttle Position Sensor (TPS)

When something goes wrong with a throttle position sensor (TPS), there are several common symptoms that may indicate a problem has occurred; some common symptoms include:

– Possible Issues with The TPS – Engine Not Starting Or Stalling – Poor Fuel Economy – Erratic Performance – Check Engine Light Illuminated
All these aforementioned issues could potentially be caused due either mechanical failure within its respective TPS unit itself or due electrical issues between its respective wiring harnesses being too worn out over time etc.. If you happen experience any one these issues mentioned above – it would be wise off you checking out first whether something has gone wrong within either one those areas before moving onto other potential causes for why these issues may have happened in first place..

Troubleshooting A Faulty Throttle Position Sensor (TPS)

If you suspect that something might have gone wrong with either one those aforementioned areas mentioned above – there are several ways which one can go about troubleshooting them accordingly! Some popular methods include testing out whether something has gone wrong within either one those areas mentioned above via visual inspection techniques along with electrical tests being performed simultaneously alongside replacing out entire unit if need be after determining that nothing else can be done correctly no more!

Common Causes Of Faulty Throttle Position Sensors (TPS)

Some common causes for why faulty TPS units may occur include clogged air filters being present within their respective intake manifolds over time along with vacuum leaks occurring over long periods usage as well as excessive oil contamination taking place inside their respective mechanical parts over extended amounts usage etc.. Electrical issues could potentially arise too but usually only occur once some other underlying issue has already taken place first before hand!

Diagnosing Problems With Honda Accord Throttle Position Sensors (TPS)
If you own a Honda Accord model vehicle & suspect something has gone wrong within its respective throttle position sensors – then there are several ways which one can go about diagnosing potential problems accordingly! For starters – visual inspection techniques should definitely be performed first before anything else since they provide invaluable insight into what exactly might have gone wrong inside underneath hood area before hand! Afterwards – electrical tests should also be performed if necessary too since they can detect whether anything else has gone wrong electrically wise within their respective wiring harnesses over long periods usage as well! Finally – replacing out entire unit should also take place once everything else has been exhausted since nothing else will work correctly no more after that point onwards unfortunately…

Common Honda Accord Models Affected by Throttle Position Sensor Problems

The Honda Accord is one of the most popular cars on the road today, and with its popularity comes a variety of issues that can affect its performance. One of the most common problems associated with the Honda Accord is throttle position sensor (TPS) issues. This particular problem can be found in 1998-2002 models of the vehicle. The TPS is a crucial component as it helps to regulate how much air and fuel are entering the engine and allows for a smooth acceleration process.

Solutions for Honda Accord TPS Problems

Fortunately, there are several solutions that can be employed to address this issue. The first is to clean the TPS connector, which can easily be done with a rag and some rubbing alcohol. Additionally, it may be necessary to replace any worn out parts or components that could be causing the issue. This may include spark plugs, fuel injectors, or other parts related to the TPS system. If these solutions do not work, then it may be necessary to have a professional inspect and repair the vehicle.

Cost of Replacing or Repairing Honda Accord TPS

The cost of replacing or repairing a Honda Accord’s TPS can vary depending on the specific parts needed and the labor required for installation. Generally speaking, however, it should cost between $200-$400 for parts and labor combined. This estimate does not account for any additional repair work that may need to be done as a result of faulty components or other mechanical issues related to the TPS system.

Tips for Preventing Future Problems with Honda Accord TPS

In order to prevent future problems related to throttle position sensor issues in your Honda Accord, it is important to follow some basic maintenance tips such as regularly checking all connections and harnesses, as well as performing regular maintenance checks and services on your vehicle. Additionally, if you suspect any issues with your vehicle’s TPS system then it is best to have a professional inspect and diagnose any potential problems before attempting any repairs yourself.

FAQ & Answers

Q: What is a Throttle Position Sensor (TPS)?
A: A throttle position sensor (TPS) is a device that monitors the air intake of an internal combustion engine. It measures the position of the throttle valve in order to control engine speed and fuel efficiency. The TPS is usually located on the throttle body or intake manifold.

Q: What are the symptoms of a bad Throttle Position Sensor?
A: Common symptoms of a bad TPS include engine not starting or stalling, poor fuel economy, erratic performance, and a check engine light illuminated.

Q: What are common causes of faulty Throttle Position Sensors?
A: Common causes of faulty TPS include clogged air filters, vacuum leaks, excessive oil contamination, and electrical issues.

Q: What is the cost of replacing or repairing Honda Accord TPS?
A: The cost of replacing or repairing Honda Accord TPS can vary depending on the type and model. Generally speaking, it can range anywhere from $100 to $400 for parts and labor.

Q: How can I prevent future problems with my Honda Accord TPS?
A: To prevent future problems with your Honda Accord TPS, it is important to have regular maintenance checks and services done. Additionally, make sure to check all connections and harnesses for any signs of wear or damage.

In conclusion, Honda Accord throttle position sensor problems can be a major issue for owners of this vehicle. If the sensor malfunctions, it can lead to poor engine performance and decreased fuel efficiency. Fortunately, replacing the sensor is relatively simple and inexpensive, so if your Honda Accord is showing signs of trouble, it may be worth considering replacing the throttle position sensor as a first step in diagnosing and resolving your issue.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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