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 power going to a pump that helps clean the car's exhaust. It's getting too much electricity.
The P05F0 code indicates that the voltage in the circuit supplying power to the reductant pump is higher than expected.
The reductant pump is part of the Selective Catalytic Reduction (SCR) system, which reduces emissions by injecting a urea-based solution (DEF) into the exhaust. This code is triggered when the Engine Control Module (ECM) detects a higher than normal voltage in the circuit supplying power to the reductant pump.
• Check Engine Light illuminated
• Reduced engine performance
• Increased emissions
• Faulty reductant pump
• Wiring issues such as a short circuit
• Faulty ECM or control module
Reductant Pump: A component that pumps DEF into the exhaust system.
SCR: Selective Catalytic Reduction, a system to reduce emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage at the reductant pump.
• Repair or replace damaged wiring or connectors.
• Replace the reductant pump if faulty.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the SCR system.
• Use high-quality DEF fluid.
• Perform regular vehicle diagnostics.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
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 vehicles.
Moderate – Addressing this issue promptly can prevent further emissions system damage.
Driving with increased emissions can lead to environmental harm and may not comply with emissions regulations.
• Engine running
• Vehicle at operating temperature
The reductant pump is typically located near the DEF tank or integrated within the SCR system.
Q: Can I drive with this code?
A: It's possible to drive, but it's not recommended due to potential increased emissions and engine performance issues.
Q: Will the Check Engine Light go off by itself?
A: The light may turn off if the issue resolves, but it's best to have the system checked to prevent future problems.
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