Our certified mechanics come to you · Get a fair and transparent estimate upfront
P2125 is a diagnostic trouble code (DTC) for "Throttle/Pedal Position Sensor/Switch "E" Circuit". 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 for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
*Estimates may vary by market
P2125 is a general OBD-II trouble code indicating a fault with the throttle/pedal position sensor/switch “E” circuit. This code is similar to many other throttle body and pedal position codes.
The engine control module (ECM) uses the signals from the throttle body and position sensor to command the throttle body actuator motor to open the throttle plate. This allows air into the engine and is varied by how hard the pedal is pressed and how far.
This code will only be seen on cars with a drive-by-wire or an electronically controlled throttle body. Once the ECM detects a fault with the sensor or switch circuit “E” the P2125 code is set, and this causes a Check Engine Light to be displayed on the dashboard. With the Check Engine Light, the ECM puts the vehicle into a failsafe mode to prevent any further damage to the vehicle.
Many different components can cause the P2125 code:
Symptoms can sometimes be felt before the Check Engine Light is displayed on the dashboard. A wide range of symptoms are seen with the P2125 code such as:
Mechanics will follow these simple steps when performing diagnosis of the P2125 code:
Using a scan tool to check the ECM for any stored codes including history and pending codes
Noting all codes that are present as well as the freeze frame data associated with each code
Clearing all codes for a clean slate
Performing a test drive of the vehicle attempting to duplicate the conditions found in the freeze frame data
Conducting a visual inspection to look for any damaged components, worn or broken wires, and broken parts
Using the scan tool and its datastream to watch the sensor “E” while the throttle and gas pedal are operated. There should be changes in the values if they are working properly.
Finally, a multimeter will be used to check that voltage is present at the sensor and for continuity
Mistakes can be made with any code if steps are not followed in the proper order or skipped entirely. Overlooking simple steps can lead to the wrong components being replaced which wastes both time and money.
P2125 can have some rather serious symptoms. If the ECM can’t detect the signal from the throttle/pedal switch, it may not allow the throttle to work at all. If this occurs, the vehicle will not move at all when the gas pedal is depressed. If drivability problems are present, the vehicle should not be driven and should be repaired as soon as possible.
The most common repairs of the P2125 code are:
An advanced-level scan tool goes a long way towards helping diagnose the P2125 code. These tools give technicians access to advanced features in the ECM with the most helpful being the ECM’s live data stream. This tool shows sensor and solenoid data, and allows the mechanic to monitor operation and note changes over time.
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.
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.