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 a part of the car that helps reduce pollution. It's like a valve that isn't working right, and it helps clean the car's exhaust.
The P2053 code indicates an issue with the electrical circuit or the valve itself that injects a special fluid into the exhaust to reduce emissions.
The reductant injection valve is part of the Selective Catalytic Reduction (SCR) system, which injects Diesel Exhaust Fluid (DEF) into the exhaust stream to reduce nitrogen oxide emissions. This code is triggered when the Engine Control Module (ECM) detects an open circuit or malfunction in the reductant injection valve circuit for Bank 1 Unit 2.
• Check Engine Light illuminated
• Reduced engine performance
• Increased emissions
• Faulty reductant injection valve
• Open or shorted wiring in the valve circuit
• Bad connection or corrosion in the valve connector
SCR: Selective Catalytic Reduction, a system to reduce emissions in diesel engines.
DEF: Diesel Exhaust Fluid, a fluid used in SCR systems to reduce nitrogen oxide emissions.
• Use a scan tool to verify the code and check for other related codes.
• Inspect the wiring and connectors for the reductant injection valve for damage or corrosion.
• Test the reductant injection valve for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant injection valve if faulty.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regular maintenance of the SCR system
• Ensure quality DEF fluid is used
• Inspect wiring and connectors periodically
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of SCR systems in diesel engines to meet emissions standards.
Moderate – While the vehicle may still be drivable, emissions and performance could be affected.
Driving with this code may result in higher emissions, which could be against local regulations.
• Engine running
• Vehicle at normal operating temperature
The reductant injection valve is typically located near the exhaust system, close to the SCR catalyst.
Q: Can I drive with a P2053 code?
A: You can drive, but it's best to fix it soon to avoid increased emissions and potential engine performance issues.
Q: What happens if I ignore the P2053 code?
A: Ignoring the code could lead to higher emissions, potential fines, and further damage to the SCR system.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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.