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 circuit voltage typically points to a short to power, a faulty glow plug, or a problem with the glow plug control module.
1. Most Common Causes
- Short to battery voltage in the glow plug control circuit
- Faulty exhaust aftertreatment glow plug
- Defective glow plug control module
- Corroded or damaged wiring/connectors
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Increased exhaust emissions
- Possible difficulty with DPF regeneration
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the glow plug wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the glow plug resistance with a multimeter; compare to manufacturer specs.
Step 4: Check the glow plug control module for proper operation and power supply.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to incomplete DPF regeneration and potential damage to the aftertreatment system.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.