Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car's computer thinks the gas pedal is being pressed too hard or too much, even when it isn't. It's like when a video game controller button gets stuck and keeps sending the wrong signal.
The P2128 code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the throttle or pedal position sensor/switch E circuit.
The throttle/pedal position sensor/switch E is responsible for sending the position of the throttle or pedal to the car's computer. If the voltage signal from this sensor is higher than expected, the ECM will set the P2128 code. This high voltage condition could be due to a short circuit, faulty sensor, or wiring issues.
• Check Engine Light is on
• Reduced engine performance
• Unresponsive throttle
• Faulty throttle/pedal position sensor
• Short circuit in the wiring
• Poor electrical connection
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the P2128 code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the throttle/pedal position sensor for correct operation.
• Repair or replace damaged wiring or connectors.
• Replace the throttle/pedal position sensor if faulty.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect wiring and connectors for damage.
• Keep the throttle body clean.
• Ensure proper maintenance of the vehicle's electrical system.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on the throttle/pedal position sensor.
This code has been associated with throttle position sensor issues since the introduction of electronic throttle control systems.
Moderate – It should be addressed soon to avoid potential drivability issues.
Driving with a malfunctioning throttle sensor can lead to unexpected acceleration or deceleration, posing a safety risk.
• Engine running
• Vehicle in park or neutral
The throttle/pedal position sensor is typically located on the throttle body or the accelerator pedal assembly.
Q: Can I drive my car with a P2128 code?
A: It's not recommended to drive for long periods with this code, as it can affect vehicle performance and safety.
Q: How do I reset the P2128 code?
A: You can reset the code using an OBD-II scanner after the issue is fixed.
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