Exhaust Aftertreatment Glow Plug Circuit/Open
The P269F code indicates a fault in the exhaust aftertreatment glow plug circuit, typically found in diesel engines. This glow plug is used to heat the diesel particulate filter (DPF) or selective catalytic reduction (SCR) system to aid in regeneration and reduce emissions. An open circuit means there is a break in the electrical path, preventing the glow plug from functioning. This can lead to incomplete regeneration, increased emissions, and potential DPF clogging.
01. Most Common Causes
- Faulty exhaust aftertreatment glow plug
- Open or shorted wiring in the glow plug circuit
- Blown fuse or relay for the glow plug circuit
- Corroded or loose connector at the glow plug
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Increased exhaust emissions
- Possible DPF regeneration issues
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the glow plug wiring and connector for damage, corrosion, or looseness.
Step 3: Test the glow plug resistance with a multimeter (should be low ohms); an open circuit indicates a faulty plug.
Step 4: Check the fuse and relay for the glow plug circuit; replace if blown.
Step 5: If wiring and fuse are okay, replace the exhaust aftertreatment glow plug.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but prolonged driving may cause DPF clogging and reduced performance. It is recommended to address the issue promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and shop rates.