Damaged or corroded wiring harness at the accelerator pedal position sensor connector; Faulty throttle or pedal position sensor E itself, including internal potentiometer wear; Poor electrical connection at the engine control module or throttle actuator control module; CAN bus wiring fault such as an open circuit, chafed wire, or water intrusion in a connector; Failed or failing control module that hosts the sensor E signal, including a low-voltage event; Aftermarket electronic accessories improperly tapped into the pedal sensor wiring

DTC codes / U06xx · Network communication / U0682

U0682Lost Communication With Throttle/Pedal Position Sensor/Switch E

U0682 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the throttle or pedal position sensor/switch designated as E. The computer detected that expected messages from that sensor or its dedicated module stopped arriving within the required time window, which can disable normal throttle response and trigger reduced-power mode.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork communication

Symptoms you may notice

Illuminated check engine light or electronic throttle control warning lamp
Reduced engine power or limp-home mode with limited throttle response
Engine may idle erratically or stall when coming to a stop
Accelerator pedal feels unresponsive or requires excessive travel to rev the engine
Often no symptoms besides the warning light if the fault is intermittent
Transmission may shift harshly or refuse to downshift because throttle data is missing

Common causes, most likely first

Damaged or corroded wiring harness at the accelerator pedal position sensor connector
Faulty throttle or pedal position sensor E itself, including internal potentiometer wear
Poor electrical connection at the engine control module or throttle actuator control module
CAN bus wiring fault such as an open circuit, chafed wire, or water intrusion in a connector
Failed or failing control module that hosts the sensor E signal, including a low-voltage event
Aftermarket electronic accessories improperly tapped into the pedal sensor wiring

How to diagnose and fix it

Scan all modules for stored and pending codes, then record freeze-frame data for U0682 before clearing anything
Visually inspect the accelerator pedal sensor connector and harness for corrosion, pushed pins, or chafing
Measure reference voltage and ground at the pedal sensor E connector with the key on and compare to manufacturer specifications
Perform a wiggle test on the harness while watching live pedal position data to expose an intermittent connection
Check CAN bus resistance and voltage levels at the diagnostic connector to rule out a network-wide fault
If wiring and voltages are correct, substitute a known-good sensor or module only after confirming the signal circuit is intact
Clear codes and perform a throttle relearn or idle relearn procedure, then road test to confirm the code does not return

What a U0682 often really means

A loose or corroded ground at the pedal sensor bracket is a frequent culprit that mimics a failed sensor and is missed when technicians replace parts without voltage-drop testing.
U0682 can be set by a low battery or a jump-start event that momentarily drops module voltage, so check for companion low-voltage codes before condemning the sensor.
Aftermarket floor mats, pedal covers, or alarm wiring tapped into the pedal harness commonly disturb the signal and set this code on otherwise healthy vehicles.
The code does not always mean the sensor is dead; a failed CAN transceiver inside another module can stop the message from arriving and set U0682 with a perfectly good pedal sensor.
On vehicles with a smart throttle actuator, a carbon-fouled throttle body can cause the module to reject pedal data and store U0682 alongside throttle performance codes.

Can I keep driving with U0682?

If the vehicle is in reduced-power mode, drive only at low speed to a safe location or a repair shop, because throttle response may be unpredictable. Avoid highway driving and towing until the fault is diagnosed and repaired.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.