What does code P269B mean?

Q: What does code P269B mean?

Exhaust Aftertreatment Glow Plug Control Circuit / Open. P269B indicates that the powertrain control module (PCM) has detected an open circuit or control fault in the glow plug circuit used for exhaust aftertreatment, such as a diesel particulate filter (DPF) or selective catalytic reduction (SCR) system. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is outside the normal range, often due to a wiring break, failed glow plug, or control module issue.

DTC codes / P26xx · Computer and output circuits / P269B

P269BExhaust Aftertreatment Glow Plug Control Circuit / Open

P269B indicates that the powertrain control module (PCM) has detected an open circuit or control fault in the glow plug circuit used for exhaust aftertreatment, such as a diesel particulate filter (DPF) or selective catalytic reduction (SCR) system. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is outside the normal range, often due to a wiring break, failed glow plug, or control module issue.

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.