What Does P2419 Mean?
The PCM detects that the EVAP switching valve control circuit voltage is lower than expected. The circuit is shorted to ground or has excessive resistance.
Common Causes
40%
Control wire shorted to ground in wiring harness
30%
Failed EVAP switching valve with internal short to ground
15%
Damaged connector causing short circuit at valve
10%
Water intrusion in connector or valve causing short
5%
PCM internal short in driver circuit
Diagnostic Steps
1
Step 1: Disconnect EVAP switching valve connector and recheck code - if code clears, valve is shorted internally
2
Step 2: With valve disconnected, measure resistance from control wire to ground - should be infinite (open circuit)
3
Step 3: Inspect wiring harness for chafing, pinch points, or damage where wire may contact ground
4
Step 4: Check for water or corrosion inside valve connector that could cause intermittent shorts
5
Step 5: If wiring tests good, replace switching valve and retest
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The PCM detects that the EVAP switching valve control circuit voltage is lower than expected. The circuit is shorted to ground or has excessive resistance.
The most common cause of P2419 (Evaporative Emission System Switching Valve Control Circuit Low) is: Control wire shorted to ground in wiring harness
Typical repair costs for P2419 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. Vehicle will fail emissions testing and may set check engine light.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2419 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
