What Does P2426 Mean?
The voltage in the EGR cooling valve control circuit is lower than expected. This indicates a short to ground or excessive current draw in the circuit.
Common Causes
40%
Wiring shorted to ground
35%
Failed EGR cooling valve with internal short
15%
Damaged connector causing short circuit
7%
Water intrusion in electrical components
3%
PCM driver circuit malfunction
Diagnostic Steps
1
Step 1: Disconnect EGR cooling valve connector and check for voltage at harness side
2
Step 2: Test resistance of EGR cooling valve; compare to specifications
3
Step 3: Check for continuity between control wire and ground with valve disconnected
4
Step 4: Inspect wiring harness routing for pinch points or chafing against metal
5
Step 5: Monitor circuit voltage with scan tool while wiggling harness to locate intermittent shorts
Estimated Repair Cost
$120 - $750
Parts + labor, varies by vehicle and location
The voltage in the EGR cooling valve control circuit is lower than expected. This indicates a short to ground or excessive current draw in the circuit.
The most common cause of P2426 (Exhaust Gas Recirculation Cooling Valve Control Circuit Low) is: Wiring shorted to ground
Typical repair costs for P2426 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. Lack of proper EGR cooling may lead to elevated exhaust temperatures and potential engine damage over time.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2426 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.
