P26A0 OBD-II: Exhaust Aftertreatment Glow Plug Performance

OBD II Fault Code

• OBD II P26A0

OBD-II Code Decreased engine performance is defined as a Exhaust Aftertreatment Glow Plug Performance

Diesel Exhaust Fluid (DEF) is used to assist in converting leftover exhaust particles to harmless gases. In order to burn off those particles, the temperature of the exhaust system needs to increase. the injection of DEF Fluid into the exhaust stream brings Diesel Particulate Filter (DPF) up to temperature. The system is then able to convert harmful NOx to Nitrogen, Carbon Dioxide, and water. The Glow Plug keeps the DEF from freezing in extremely cold temperatures. If the glow plug fails to operate as requested, code P26A0 will be stored.

Decreased engine performance Symptoms

• Decreased engine performance
• DPF regeneration may not occur

Common Problems That Trigger the P26A0 Code

• Glow plug control module failure
• Glow plug relay failure
• Powertrain Control Module (PCM) failure
• Wiring issue