Exhaust Aftertreatment Glow Plug Control Circuit High
The P269E code indicates that the powertrain control module (PCM) has detected a high voltage condition in the control circuit for the exhaust aftertreatment glow plug. 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. A high voltage reading suggests a short to power, a faulty glow plug, or a problem with the control module.
01. Most Common Causes
- Short to voltage in the glow plug control circuit
- Faulty exhaust aftertreatment glow plug
- Damaged wiring or connector
- Failed PCM or glow plug control module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Increased exhaust emissions
- Possible DPF regeneration issues
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve freeze frame data and confirm the code.
Step 2: Visually inspect the glow plug wiring and connector for damage, corrosion, or shorts.
Step 3: Measure voltage at the glow plug connector with the ignition on; compare to manufacturer specs.
Step 4: Test the glow plug resistance; replace if out of range.
Step 5: Check for shorts to power in the control circuit; repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to DPF clogging and increased emissions. Short trips may be okay, but have it diagnosed soon.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause and labor rates.