P2427 Fault Code

Exhaust Gas Recirculation Cooling Valve Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2427 fault code indicates an issue with the Exhaust Gas Recirculation (EGR) cooling valve control circuit being high. This situation arises when the engine control module (ECM) detects an unexpected voltage level in the EGR cooling valve circuit.

• The EGR cooling valve is essential in reducing emissions by recirculating a portion of the exhaust gas back into the engine’s intake.
• A malfunction in this circuit can lead to increased emissions and may affect engine performance.

What are the symptoms of the P2427 code?

Common symptoms associated with the P2427 fault code include:

• Illuminated check engine light.
• Rough engine idle or stalling.
• Decreased fuel efficiency.
• Increased emissions during testing or inspection.
• Poor engine performance under load.

What causes the P2427 code?

Several factors can cause the P2427 code, including:

• A malfunctioning EGR cooling valve.
• Damaged wiring or connectors in the EGR circuit.
• A faulty ECM that is incorrectly interpreting sensor signals.
• Issues with related components like the EGR cooler or vacuum actuators.

How to fix P2427?

To resolve the P2427 code, the following steps should be taken:

• Inspect the EGR cooling valve and its circuit for any visible signs of damage.
• Check for continuity and proper voltage in the wiring. Repair any damaged wires or corroded connectors.
• If the EGR cooling valve is found malfunctioning, replace it.
• Clear the fault code and conduct a test drive to ensure the issue is resolved and the check engine light does not illuminate again.