Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps reduce pollution. It's like a little valve that sprays a special liquid to make the car's exhaust cleaner, and it's not working right.
The P2EAE code indicates an issue with the reductant injection valve circuit on Bank 1, Unit 2. This valve is part of the Selective Catalytic Reduction (SCR) system, which reduces emissions by injecting a urea-based solution into the exhaust.
The reductant injection valve is responsible for injecting a precise amount of diesel exhaust fluid (DEF) into the exhaust stream to reduce nitrogen oxide emissions. The P2EAE code is triggered when the Engine Control Module (ECM) detects a range or performance problem with the valve's circuit, which could be due to electrical issues or mechanical failure.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty reductant injection valve
• Wiring issues or poor connections in the valve circuit
• Defective Engine Control Module (ECM)
Reductant: A substance used to reduce emissions, typically a urea-based solution in diesel engines.
SCR: Selective Catalytic Reduction, a system used to reduce nitrogen oxide emissions in diesel engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors to the reductant injection valve.
• Test the reductant injection valve for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant injection valve if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect and maintain the exhaust system.
• Ensure the diesel exhaust fluid is topped up.
• Check for any recalls or service bulletins related to the SCR system.
Emission System Issue
• Avoid driving long distances until the issue is fixed.
• Have the vehicle inspected by a professional mechanic.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
This code has become more common with the increased use of SCR systems in diesel vehicles to meet emission standards.
Moderate – While the vehicle may still be drivable, emissions are increased, and performance may be affected.
Driving with this code may result in failing emissions tests and could lead to fines in areas with strict emissions laws.
• Engine at operating temperature
• Vehicle in motion
The reductant injection valve is typically located near the exhaust system, close to the SCR catalyst.
Q: Can I drive with a P2EAE code?
A: While you can drive with this code, it's not recommended as it may increase emissions and reduce engine performance.
Q: What happens if I ignore this code?
A: Ignoring the code can lead to increased emissions, potential fines, and further damage to the SCR system.
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Universal · Digital multimeter
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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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.