Exhaust Aftertreatment Glow Plug Control Performance
The P269C code indicates a performance issue with the exhaust aftertreatment glow plug control circuit. This system is used to heat the diesel particulate filter (DPF) or selective catalytic reduction (SCR) system to aid in regeneration and reduce emissions. The powertrain control module (PCM) has detected that the glow plug control module or circuit is not operating within expected parameters, which can prevent proper exhaust aftertreatment function.
01. Most Common Causes
- Faulty exhaust aftertreatment glow plug control module
- Open or shorted wiring in the glow plug control circuit
- Blown fuse or relay for the glow plug system
- Corroded or loose electrical connectors
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 other related codes.
Step 2: Visually inspect the glow plug control module, wiring, and connectors for damage, corrosion, or loose connections.
Step 3: Test the glow plug control module power supply and ground circuits using a multimeter.
Step 4: Check the glow plug resistance and compare to manufacturer specifications.
Step 5: If all checks pass, replace the glow plug control module.
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 continued driving may lead to reduced fuel economy, increased emissions, and potential DPF clogging. It is recommended to diagnose and repair the issue promptly.
How much does it cost to fix?▼
The cost to fix P269C typically ranges from $50 to $150 for parts and labor, depending on the specific cause and vehicle model.