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 detected a problem with the system that helps reduce pollution from the exhaust. It's like a part of the car that helps clean the air isn't working right.
The P2064 code is triggered when the vehicle's engine control module (ECM) detects a high voltage condition in the reductant or regeneration supply control circuit.
The reductant or regeneration supply control circuit is part of the vehicle's selective catalytic reduction (SCR) system, which reduces nitrogen oxide emissions. A 'high' signal indicates that the circuit is receiving more voltage than expected, which could be due to a wiring issue, a faulty sensor, or a malfunctioning control module.
• Check Engine Light is on
• Decreased fuel efficiency
• Possible limp mode activation
• Faulty reductant control module
• Wiring issues in the reductant supply circuit
• Defective reductant heater or injector
Reductant: A substance used to reduce emissions, often diesel exhaust fluid (DEF) in diesel engines.
SCR: Selective Catalytic Reduction, a system to reduce nitrogen oxide emissions in diesel engines.
• Use an OBD-II scanner to verify the code.
• Inspect wiring and connectors in the reductant supply circuit.
• Test the reductant control module for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant control module if faulty.
• Ensure proper operation of the reductant heater or injector.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 to $500
Moderate
• Ford F-Series
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance of the SCR system
• Timely inspection of wiring and connectors
• Use high-quality diesel exhaust fluid (DEF)
Sensor Issue
• Avoid driving long distances until the issue is resolved.
• Consult with a certified mechanic for accurate diagnosis.
Check vehicle warranty for coverage on emissions-related components.
This code has become more common with the introduction of stricter emissions standards and the use of SCR systems.
Moderate – Addressing this issue will help maintain vehicle performance and emissions compliance.
Ignoring this code may result in increased emissions and potential legal penalties in areas with strict emissions regulations.
• Engine at operating temperature
• Vehicle in closed-loop mode
The reductant control module is typically located near the exhaust system or under the vehicle, depending on the make and model.
Q: Can I drive with a P2064 code?
A: It's best to have the issue checked as soon as possible to avoid potential damage and emissions problems.
Q: What happens if I ignore this code?
A: Ignoring it may lead to increased emissions, reduced fuel efficiency, and possible legal issues if emissions standards are not met.
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