What Does P2427 Mean?
The voltage in the EGR cooling valve control circuit is higher than expected. This typically indicates an open circuit, short to power, or valve resistance issue.
Common Causes
35%
Open circuit in valve control wiring
30%
Failed EGR cooling valve with open coil
20%
Wiring shorted to voltage source
10%
Poor ground connection at valve or PCM
5%
Corroded connector preventing current flow
Diagnostic Steps
1
Step 1: Disconnect EGR cooling valve and measure resistance across valve terminals
2
Step 2: Check for proper ground at valve connector with multimeter
3
Step 3: Test continuity from PCM connector to valve connector on control wire
4
Step 4: Check for battery voltage on control wire (should only have voltage when commanded)
5
Step 5: Inspect connector terminals for corrosion, bent pins, or poor contact
Estimated Repair Cost
$120 - $750
Parts + labor, varies by vehicle and location
The voltage in the EGR cooling valve control circuit is higher than expected. This typically indicates an open circuit, short to power, or valve resistance issue.
The most common cause of P2427 (Exhaust Gas Recirculation Cooling Valve Control Circuit High) is: Open circuit in valve control wiring
Typical repair costs for P2427 range from $120 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short distances. Improper EGR cooling can result in excessive exhaust temperatures potentially damaging engine components.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2427 to identify the root cause.
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Quick Info
Category
Powertrain
System
EGR System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
