What Does P269E Mean?
The PCM has detected abnormally high voltage in the exhaust aftertreatment glow plug control circuit. This electrical fault indicates an open circuit or short to voltage preventing proper glow plug operation.
Common Causes
35%
Open circuit in glow plug or wiring harness
25%
Short to voltage in glow plug control circuit
20%
Failed glow plug with internal open circuit
15%
PCM driver circuit providing excess voltage
5%
Poor ground connection causing feedback voltage
Diagnostic Steps
1
Step 1: Disconnect glow plug and measure resistance; infinite resistance indicates open circuit in element
2
Step 2: Check for voltage on glow plug circuit with key on and glow plug disconnected; should be near zero
3
Step 3: Inspect wiring harness for damage from heat, abrasion, or contact with sharp edges
4
Step 4: Test for short to voltage by checking continuity between glow plug circuit and battery positive
5
Step 5: Verify ground circuit integrity by measuring resistance from glow plug ground to battery negative
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage in the exhaust aftertreatment glow plug control circuit. This electrical fault indicates an open circuit or short to voltage preventing proper glow plug operation.
The most common cause of P269E (Exhaust Aftertreatment Glow Plug Control Circuit High) is: Open circuit in glow plug or wiring harness
Typical repair costs for P269E range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but regeneration system cannot function, which will cause DPF blockage and potential engine derate over time.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P269E to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
