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 power supply to the pump that injects a special fluid into the exhaust to reduce pollution. It's like when a toy stops working because the batteries aren't connected properly.
The P05EE code is triggered when the engine control module (ECM) detects an issue with the voltage supply circuit for the reductant pump, indicating either an open circuit or a voltage issue.
The reductant pump is part of the Selective Catalytic Reduction (SCR) system, which reduces nitrogen oxide emissions in diesel engines. The ECM monitors the voltage supply to this pump. If the voltage is too low or the circuit is open, the ECM will set the P05EE code.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty reductant pump
• Blown fuse in the reductant pump circuit
• Damaged wiring or connectors in the reductant pump circuit
ECM: Engine Control Module
SCR: Selective Catalytic Reduction
DEF: Diesel Exhaust Fluid
• Check for any other related trouble codes.
• Inspect the reductant pump fuse and replace if necessary.
• Examine the wiring and connectors for damage or corrosion.
• Replace the reductant pump if it is faulty.
• Repair or replace damaged wiring or connectors.
• Replace any blown fuses in the circuit.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly inspect and maintain the SCR system.
• Ensure proper fluid levels in the reductant tank.
• Perform regular vehicle diagnostics.
Sensor Issue
• Avoid driving for extended periods with this code active.
• Schedule a diagnostic check with a professional mechanic.
• Monitor for any changes in vehicle performance.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
The P05EE code has become more common with the increased use of SCR systems in modern diesel engines to meet stricter emissions regulations.
Moderate – While the vehicle may still be drivable, addressing the issue promptly can prevent further emissions problems.
Operating a vehicle with emissions system malfunctions may violate local emissions laws and regulations.
• Engine running
• Vehicle at operating temperature
The reductant pump is typically located near the diesel exhaust fluid (DEF) tank, often underneath the vehicle.
Q: Can I drive with a P05EE code?
A: While you may be able to drive, it's best to address the issue soon to avoid increased emissions and potential damage.
Q: What is a reductant pump?
A: A reductant pump is part of the SCR system that injects a urea-based fluid into the exhaust to reduce emissions.
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