The P269E: Exhaust Aftertreatment Glow Plug Control Circuit High code indicates that the voltage in the control circuit for the exhaust aftertreatment glow plug is higher than expected. This issue can be caused by a short to power, a malfunctioning glow plug control circuit, or wiring/connector problems. Correct voltage regulation is essential for maintaining the appropriate temperature for the aftertreatment system to function effectively.
P269E – Quick Overview
| Code | Information |
|---|---|
| Meaning | P269E: Exhaust Aftertreatment Glow Plug Control Circuit High |
| Is it serious? | Yes, as high voltage can damage the glow plug or associated components, leading to ineffective aftertreatment operation and increased emissions. |
| Possible causes | – High voltage in the exhaust aftertreatment glow plug control circuit – Faulty control circuit or components – Wiring or connector issues |
| How to diagnose? | – Measure voltage in the exhaust aftertreatment glow plug control circuit – Inspect the circuit and wiring – Check for shorts or damage in connectors – Replace components as needed |
P269E Meaning
The P269E: Exhaust Aftertreatment Glow Plug Control Circuit High code indicates that the control circuit for the aftertreatment glow plug is experiencing voltage above the expected range. This issue can be caused by a fault such as a short to power or incorrect wiring, potentially leading to damage to the glow plug or improper function. Excessive voltage can prevent the glow plug from operating correctly, affecting the efficiency of the exhaust aftertreatment system and potentially increasing emissions.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to determine if any additional related codes are present that may indicate other problems with the emissions system. | OBD-II Scanner |
| Measure Voltage in Control Circuit | Use a multimeter to measure the voltage at the glow plug control circuit. Compare the measurement to manufacturer specifications to determine if it is excessively high. | Multimeter |
| Inspect the Glow Plug and Circuit | Visually inspect the glow plug and the control circuit for signs of damage, overheating, or improper connections. Make sure the glow plug is properly mounted and that no visible defects are present. | Flashlight, Safety Gloves |
| Check Wiring and Connectors | Inspect the wiring and connectors in the control circuit. Look for damaged insulation, corroded connectors, or signs of a short to power that could be causing an excessive voltage condition. | Flashlight, Multimeter |
| Test for Short to Power | Use a multimeter to test for any shorts to power within the control circuit wiring. A short may cause excessive voltage, which can lead to damage to the glow plug. | Multimeter |
| Verify Voltage Regulator Functionality | Inspect the voltage regulation components in the glow plug control circuit to ensure they are functioning correctly and not supplying too much power. Faulty regulation could cause high voltage. | Multimeter, Diagnostic Scanner |
| Replace Faulty Components | Replace any components found to be faulty, such as the glow plug, the control unit, damaged wiring, or defective connectors, to restore normal voltage levels in the circuit. | Replacement Parts |
| Clear the Code and Test System | Use an OBD-II scanner to clear the P269E code after completing the necessary repairs. Perform a test drive to verify that the voltage is back within normal range and the glow plug is operating effectively. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle to ensure that the P269E code has not returned and verify that the glow plug and control circuit are functioning properly. | OBD-II Scanner |
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