You hop into your car, tap the gas — and nothing happens. Then suddenly, it lurches forward like a startled cat.
Chances are, your accelerator pedal position sensor is acting up. This little device tells your engine how hard you’re pressing the gas pedal and how fast to respond.
When it malfunctions, your car can hesitate, surge unexpectedly, or jerk like it’s having mood swings. That’s why fixing it promptly is essential.
But what about the costs?
Here’s everything about accelerator pedal position sensor replacement cost, what affects the pricing, and how the repair works.
This Article Contains:
- How Much Does an Accelerator Pedal Position Sensor Replacement Cost?
- Is It Worth Replacing the Accelerator Pedal Position Sensor?
- 4 Signs You Need an Accelerator Pedal Position Sensor Replacement
- How to Replace an Accelerator Pedal Position Sensor
- What Causes an Accelerator Pedal Position Sensor to Fail?
- What Are Some OBD Codes Related to the Accelerator Pedal Position Sensor?
How Much Does an Accelerator Pedal Position Sensor Replacement Cost?
Here’s a breakdown of the expenses related to changing an accelerator pedal position sensor (APPS).
A. Range
The average replacement cost can lie anywhere between $63 and $870.
This includes:
- Parts: $10 to $700
- Labor: $50 to $170
B. Factors Affecting Cost
Several factors can influence the total bill, such as:
- Vehicle make and model: Parts and labor for luxury or high-performance cars are generally more expensive than for standard vehicles.
- Location: Repair costs are typically higher in urban areas and large cities compared to rural areas.
- OEM vs aftermarket parts: OEM (original equipment manufacturer) sensors usually cost more than aftermarket alternatives.
- Additional repairs: If the mechanic suggests additional repairs, your total bill amount will increase accordingly. For example, if the throttle position sensor also needs to be changed, you’ll have to pay an additional $250 to $500.
Now that we know the replacement costs, let’s determine whether the problem is severe enough to warrant the expenses.
Is It Worth Replacing the Accelerator Pedal Position Sensor?
Yes, it is.
Ignoring a bad accelerator pedal position sensor can make everyday driving unpredictable and unsafe. The engine may hesitate when you try to accelerate or suddenly lose power while driving. Incorrect signals transmitted by the sensor to the engine control unit (ECU) can lead to poor fuel delivery and unstable engine operation.
Moreover, not replacing the faulty sensor can also cause long-term damage that can translate into costly repairs.
Yet, you’ll want to ensure the repair is truly necessary, and there will be clear signs to indicate this.
Keep reading to know more.
4 Key Signs You Need an Accelerator Pedal Position Sensor Replacement
Here are some common indicators that could point to a malfunctioning accelerator pedal position sensor:
- Illuminated check engine light: A faulty APPS can trigger the check engine light by sending incorrect signals to the ECU.
- Erratic acceleration: When the sensor fails, the vehicle may accelerate unpredictably or respond inconsistently to pedal input.
- High idle speed: Incorrect sensor readings can cause the engine to idle at higher-than-normal RPM (revolutions per minute), leading to increased fuel use and engine wear.
- Limp mode: In severe cases, the vehicle may enter limp-home mode, restricting speed and power to prevent further damage.
IMPORTANT: If your APPS fails while you are driving, your vehicle will usually enter limp mode to let you safely pull over. Once you’ve stopped, turn off the engine and contact a professional repair service immediately.
But what does the replacement process involve?
Let’s find out.
How to Replace an Accelerator Pedal Position Sensor
Replacing an APPS is not recommended as a DIY repair as it involves sensitive electronic components and computer diagnostics.
For safety and accuracy, it’s best to consult a qualified mechanic for the task.
If you would still like to know, here’s how a professional will go about it:
- Check the sensor voltage using a multimeter.
- Press the gas pedal and compare readings to the manufacturer’s specs.
- If the voltage specs don’t match, scan for diagnostic codes and confirm that the sensor is actually faulty before replacing it.
- Remove the throttle/accelerator trim cover to access the sensor.
- Disconnect the defective sensor and remove it from the pedal assembly.
- Install the new accelerator pedal position sensor and reconnect all electrical connectors.
- Clear the diagnostic trouble codes and reset the ECU using a scan tool.
- Start the engine and test the sensor for proper operation.
- Reinstall the trim panel.
- Road-test the vehicle to ensure smooth acceleration and proper throttle response.
The replacement may also leave you wondering why the sensor failed in the first place.
What Causes an Accelerator Pedal Position Sensor to Fail?
An accelerator pedal position sensor may malfunction due to the following reasons:
- Frequent use of the accelerator pedal can wear out the sensor and disturb its wiring.
- Damaged or loose cables and electrical connections can cause sensor failure.
- Missing voltage or poor ground supply can interrupt proper sensor operation.
Next, we’ll look at some diagnostic trouble codes that can appear as a result of these issues.
What Are Some OBD Codes Related to the Accelerator Pedal Position Sensor?
Diagnostic codes that relate to APPS issues include:
- P0120 (Throttle/Pedal Position Sensor “A” Circuit): This means the engine computer has detected a general electrical problem in the throttle or accelerator pedal sensor circuit.
- P0121 (Throttle Position Sensor ‘A’ Circuit Range Performance Problem): The sensor is sending signals that don’t match what the engine computer expects, often causing poor acceleration or hesitation.
- P0122 (Throttle Position Sensor/Switch ‘A’ Circuit Low Input): The sensor signal is too low, which usually results in weak acceleration or the car entering limp-home mode.
- P0123 (Throttle Position Sensor/Switch ‘A’ Circuit High Input): The sensor signal is too high, which can cause sudden acceleration, rough idling, or transmission shifting issues.
Keep Your Rides Jerk-Free with AutoNation Mobile Service
A bad accelerator pedal position sensor can turn driving into a guessing game, with random delays and sudden bursts of speed.
Call a pro instead of waiting for things to get worse.
If you are pressed for time or don’t feel safe driving, AutoNation Mobile Service can fix the problem right from your driveway. We’re available all week and offer upfront pricing paired with a 12-month, 12,000-mile warranty.
Get a free quote and schedule an appointment for a hassle-free car repair experience.