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 when a toy's battery connection is loose, and it doesn't work right.
The car's computer has detected an issue with the electrical circuit that controls the injection of a fluid used to reduce emissions from the exhaust.
The P2047 code is triggered when the Engine Control Module (ECM) detects an open circuit in the reductant injection valve for Bank 1 Unit 1. This valve is part of the Selective Catalytic Reduction (SCR) system, which injects a urea-based fluid (DEF) into the exhaust stream to reduce NOx emissions. An open circuit means there is a break or disconnection in the wiring or the valve itself.
• Check Engine Light illuminated
• Possible reduction in engine performance
• Increased emissions
• Poor fuel economy
• Faulty reductant injection valve
• Open or shorted wiring in the reductant injection valve circuit
• Poor electrical connection at the reductant injection valve
• Faulty ECM
ECM: Engine Control Module
SCR: Selective Catalytic Reduction
DEF: Diesel Exhaust Fluid
• Use an OBD-II scanner to verify the code and check for other related codes.
• Inspect the wiring and connections to the reductant injection valve for damage or corrosion.
• Test the reductant injection valve for proper operation using a multimeter.
• Check the ECM for proper function if other components are working correctly.
• Repair or replace damaged wiring or connectors in the reductant injection valve circuit.
• Replace the reductant injection valve if it is found to be faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $600
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• RAM 2500
• Regularly inspect and maintain the exhaust system.
• Ensure proper installation of the reductant injection system components.
• Use quality DEF fluid to prevent contamination.
Sensor Issue
• Avoid driving for extended periods with the Check Engine Light on.
• Consult a professional mechanic for accurate diagnosis and repair.
Repairs may be covered under the vehicle's emissions warranty.
This code has become more common with the increase in stringent emissions regulations requiring SCR systems.
Moderate – While not immediately critical, addressing this issue will prevent further emissions and potential engine performance issues.
Operating a vehicle with increased emissions may violate environmental regulations.
• Vehicle at operating temperature
• Engine running at various speeds
The reductant injection valve is typically located in the exhaust system, near the catalytic converter.
Q: Can I drive my car with a P2047 code?
A: It's possible, but not recommended. Driving with this code can lead to increased emissions and potential engine performance issues.
Q: What is DEF fluid?
A: DEF (Diesel Exhaust Fluid) is a urea-based fluid used in SCR systems to reduce NOx emissions from diesel engines.
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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.