What Does P269F Mean?
The powertrain control module has detected an open circuit or complete electrical failure in the exhaust aftertreatment glow plug circuit. This glow plug is used to heat the diesel particulate filter or SCR catalyst during regeneration.
Common Causes
35%
Failed aftertreatment glow plug element (burnout or internal break)
30%
Broken, corroded, or disconnected wiring harness to glow plug
20%
Blown fuse or failed relay in glow plug power circuit
10%
Failed glow plug control module or driver circuit in ECM
5%
Poor ground connection at glow plug or module
Diagnostic Steps
1
Step 1: Visually inspect glow plug wiring harness and connectors for damage, corrosion, or disconnection
2
Step 2: Check fuses and relays related to aftertreatment glow plug circuit
3
Step 3: Measure resistance of glow plug element (typically 0.5-2 ohms when cold; infinite resistance indicates open circuit)
4
Step 4: Test for power and ground at glow plug connector with key on
5
Step 5: If all wiring and power are good, replace glow plug and retest
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The powertrain control module has detected an open circuit or complete electrical failure in the exhaust aftertreatment glow plug circuit. This glow plug is used to heat the diesel particulate filter or SCR catalyst during regeneration.
The most common cause of P269F (Exhaust Aftertreatment Glow Plug Circuit/Open) is: Failed aftertreatment glow plug element (burnout or internal break)
Typical repair costs for P269F range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but DPF regeneration may be incomplete, leading to reduced engine performance and potential DPF clogging over time.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P269F to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions/Exhaust Aftertreatment
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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