What does code P26A2 mean?

Q: What does code P26A2 mean?

Exhaust Aftertreatment Glow Plug Circuit High. P26A2 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the exhaust aftertreatment glow plug circuit, which is used to heat the exhaust system for emissions control. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, typically indicating an open circuit, high resistance, or a faulty glow plug.

DTC codes / P26xx · Computer and output circuits / P26A2

P26A2Exhaust Aftertreatment Glow Plug Circuit High

P26A2 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the exhaust aftertreatment glow plug circuit, which is used to heat the exhaust system for emissions control. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, typically indicating an open circuit, high resistance, or a faulty glow plug.

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.