• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Faulty EGR position sensor
• Wiring issues or poor electrical connections
• Faulty EGR valve
EGR: Exhaust Gas Recirculation
ECM: Engine Control Module
• P0405
• P0406
EGR Sensor B Circuit Low
Your car has a system that helps reduce pollution, and it's not working right because one of its sensors isn't getting enough power.
The EGR (Exhaust Gas Recirculation) system helps reduce emissions by recirculating a portion of the exhaust gases back into the engine cylinders. The EGR Sensor B monitors the position of the EGR valve. A 'Circuit Low' code indicates that the sensor is reading a voltage lower than the expected range.
The P0407 code is triggered when the Engine Control Module (ECM) detects that the EGR Sensor B circuit is reporting a voltage that is lower than the specified threshold. This could be due to a faulty sensor, wiring issues, or a problem with the EGR valve itself.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the EGR sensor.
• Test the EGR sensor for proper voltage output.
• Repair or replace damaged wiring or connectors.
• Replace the EGR position sensor.
• Replace the EGR valve if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and clean the EGR valve.
• Ensure all electrical connections are secure.
• Use quality fuel to reduce carbon buildup.
Sensor Issue
• Have the vehicle inspected by a professional if you're unsure.
• Avoid driving for long periods if the Check Engine Light is on.
Check your vehicle's warranty for coverage on emissions-related components.
The P0407 code has been a common issue in vehicles with EGR systems, particularly in models from the early 2000s.
Moderate – Addressing this issue promptly can prevent further engine performance problems.
Ignoring emissions-related codes can lead to increased pollution and potential legal issues in areas with strict emissions laws.
• Engine at operating temperature
• Idle and under load conditions
The EGR sensor is typically located near the EGR valve, which is mounted on or near the intake manifold.
Q: Can I drive my car with a P0407 code?
A: While you may be able to drive the car, it's best to fix the issue soon to avoid increased emissions and potential engine performance problems.
Q: How can I clear a P0407 code?
A: After repairing the issue, you can clear the code with an OBD-II scanner. If the problem persists, the code will return.
