What does code P26DF mean?

Q: What does code P26DF mean?

Sensor Power Supply D Circuit / Open. P26DF indicates that the powertrain control module (PCM) has detected an open circuit or supply voltage fault on the 'D' sensor power supply circuit, which typically feeds a group of sensors such as the mass airflow sensor, throttle position sensor, or manifold absolute pressure sensor. The PCM monitors the voltage on this dedicated reference line and sets the code when the voltage falls outside the expected range, often because a sensor, connector, or wiring has failed.

DTC codes / P26xx · Computer and output circuits / P26DF

P26DFSensor Power Supply D Circuit / Open

P26DF indicates that the powertrain control module (PCM) has detected an open circuit or supply voltage fault on the 'D' sensor power supply circuit, which typically feeds a group of sensors such as the mass airflow sensor, throttle position sensor, or manifold absolute pressure sensor. The PCM monitors the voltage on this dedicated reference line and sets the code when the voltage falls outside the expected range, often because a sensor, connector, or wiring has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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