Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has found a problem with the part that helps clean the car's exhaust. It's like a special heater that isn't working right.
The P269B code is triggered when the Engine Control Module (ECM) detects an open circuit or malfunction in the exhaust aftertreatment glow plug control circuit.
The exhaust aftertreatment system uses glow plugs to heat up certain components to help reduce emissions. The control circuit for these glow plugs is monitored by the ECM. If the circuit is open or not functioning properly, the ECM will set the P269B code.
• Check Engine Light illuminated
• Increased emissions
• Possible decrease in fuel efficiency
• Faulty exhaust aftertreatment glow plug
• Damaged wiring or connectors in the glow plug circuit
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the glow plug for proper operation.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-250
• Regularly inspect and maintain the exhaust system.
• Ensure wiring and connectors are free from corrosion.
• Use quality fuel to reduce emissions.
Sensor Issue
• Address the issue promptly to avoid increased emissions.
• Consult a professional mechanic if unsure about repairs.
Check vehicle warranty for coverage on emissions-related components.
This code has become more common with stricter emissions regulations and the increased use of aftertreatment systems in diesel engines.
Moderate – It is important to address this issue to maintain emissions compliance and vehicle performance.
Ignoring emissions-related issues can lead to fines and increased pollution.
• Engine at operating temperature
• Vehicle running under normal conditions
The exhaust aftertreatment glow plug is typically located near the exhaust system, often close to the diesel particulate filter or catalytic converter.
Q: Can I drive with a P269B code?
A: While the car may still run, it's best to fix the issue soon to avoid increased emissions and potential damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the exhaust system can help prevent this code.
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Universal · Digital multimeter
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.