What Does P269C Mean?
The PCM has detected that the exhaust aftertreatment glow plug is not performing as expected during regeneration cycles. The glow plug may not be heating properly or reaching target temperature to ignite fuel in the exhaust stream.
Common Causes
40%
Degraded or weak aftertreatment glow plug element
25%
Low voltage supply to glow plug circuit
20%
Excessive resistance in glow plug circuit wiring
10%
Carbon buildup on glow plug tip reducing efficiency
5%
PCM control module software or calibration issue
Diagnostic Steps
1
Step 1: Measure battery voltage and charging system output; ensure minimum 12.5V with engine running
2
Step 2: Test glow plug resistance and compare to specifications; resistance outside range indicates degradation
3
Step 3: Measure voltage drop across glow plug circuit during operation; excessive drop indicates wiring issues
4
Step 4: Remove and inspect glow plug for carbon buildup, physical damage, or discoloration
5
Step 5: Monitor glow plug current draw with amp clamp during activation; compare to specifications
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
The PCM has detected that the exhaust aftertreatment glow plug is not performing as expected during regeneration cycles. The glow plug may not be heating properly or reaching target temperature to ignite fuel in the exhaust stream.
The most common cause of P269C (Exhaust Aftertreatment Glow Plug Control Performance) is: Degraded or weak aftertreatment glow plug element
Typical repair costs for P269C range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive but incomplete regeneration will cause DPF saturation, potentially leading to engine power reduction or shutdown.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P269C to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
