Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car has a part that helps control pollution, and it's stuck open, which means it's not working right.
The Exhaust Gas Recirculation (EGR) system is designed to reduce emissions by recirculating a portion of the exhaust gases back into the engine cylinders. The 'C' control refers to a specific part of this system. When it's stuck open, it allows too much exhaust gas into the engine.
The P23E5 code indicates that the EGR valve, specifically the 'C' control circuit, is not closing as it should. This can lead to an imbalance in the air-fuel mixture, causing poor engine performance and increased emissions.
• Check engine light on
• Rough idle
• Reduced engine performance
• Faulty EGR valve
• Carbon buildup in the EGR valve
• Wiring issues in the EGR circuit
EGR: Exhaust Gas Recirculation
OBD-II: On-Board Diagnostics II
• Scan the vehicle for additional codes
• Inspect the EGR valve for carbon buildup
• Check the wiring and connectors for damage
• Clean the EGR valve
• Replace the EGR valve if faulty
• Repair or replace damaged wiring
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance of the EGR system
• Use quality fuel to reduce carbon buildup
• Periodic cleaning of the EGR valve
Engine Performance
• Have the vehicle inspected by a professional
• Avoid driving long distances until repaired
Check if the vehicle's emissions system is covered under warranty.
The EGR system has been used in vehicles for decades to reduce emissions. Issues with EGR valves sticking are common as vehicles age.
Moderate – It affects emissions and performance but is not an immediate safety concern.
Driving with a malfunctioning EGR system may lead to increased emissions, which could be illegal in some areas.
• Engine at operating temperature
• Vehicle in a safe location
The EGR valve is typically located on the engine, near the intake manifold.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to increased emissions and poor engine performance.
Q: Can I drive my car with this code?
A: While you can drive with this code, it's best to address it soon to avoid further issues.
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