Exhaust Aftertreatment Glow Plug Control Performance
The P269C code indicates that the powertrain control module (PCM) has detected a performance issue with the exhaust aftertreatment glow plug control circuit. This system is used to heat the aftertreatment devices (such as the diesel particulate filter or selective catalytic reduction) to reduce emissions during cold starts or regeneration. The code sets when the glow plug current or response time is outside expected parameters, often due to a faulty glow plug, wiring issues, or a failed control module.
1. Most Common Causes
- Faulty exhaust aftertreatment glow plug
- Open or shorted glow plug wiring or connector
- Failed glow plug control module or relay
- Corroded or damaged electrical connections
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Increased emissions
- Poor engine performance during cold starts
- Possible difficulty starting in cold weather
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the glow plug wiring and connectors for damage or corrosion.
Step 3: Test the glow plug resistance with a multimeter (typically 0.5-2 ohms).
Step 4: Check the glow plug control module power and ground circuits.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the vehicle may fail emissions tests and could experience reduced performance or increased fuel consumption. Prolonged driving may damage aftertreatment components.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on the specific cause and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.