Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system that helps reduce pollution called the EGR. This code means that the computer in your car is saying there's a problem with the part of the EGR system that controls it. It's like when a remote control doesn't work because of a bad connection.
The P045C code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the EGR B control circuit.
The Exhaust Gas Recirculation (EGR) system is designed to reduce nitrogen oxide emissions by recirculating a portion of the engine's exhaust back to the engine cylinders. The EGR B control circuit is responsible for managing this process. A 'low' circuit condition indicates that the voltage or signal is below the expected range, suggesting a possible wiring issue, faulty EGR valve, or ECM problem.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty EGR valve
• Poor electrical connection in the EGR circuit
• Damaged wiring in the EGR circuit
EGR: Exhaust Gas Recirculation
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the EGR valve and its wiring for damage.
• Test the voltage and continuity of the EGR control circuit.
• Replace or repair the EGR valve.
• Fix any damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the repair was successful.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and clean the EGR valve.
• Ensure all electrical connections are secure.
• Perform routine maintenance checks.
Engine Performance
• Have the vehicle inspected by a professional if you're not comfortable with car repairs.
• Avoid prolonged driving with the Check Engine Light on.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
The P045C code has been a common issue in vehicles with EGR systems, particularly as vehicles age and components wear out.
Moderate – It's important to address this issue to prevent increased emissions and potential engine performance problems.
Driving with a malfunctioning EGR system can increase emissions and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in closed-loop mode
The EGR valve is typically located near the intake manifold, connected to the exhaust system.
Q: Can I drive with a P045C code?
A: While the car might still drive, it's not recommended to ignore this code as it can lead to increased emissions and engine performance issues.
Q: How can I reset the Check Engine Light?
A: After fixing the issue, you can use an OBD-II scanner to clear the code and reset the light.
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