P2419EVAP System

Evaporative Emission System Switching Valve Control Circuit Low

The control module has detected low voltage in the EVAP switching valve control circuit, typically caused by a short to ground in the wiring or a failed valve solenoid.

🚗 Yes. It is an emissions fault with no drivability impact, but it should be repaired for emissions compliance.

LOW

severity

🎯 Top Causes, Ranked by Likelihood

#1Short to ground in wiring$80-$250

35%

A chafed control wire contacts ground, pulling the circuit voltage low.

#2Faulty switching valve$100-$300

30%

A shorted solenoid winding pulls the control circuit low.

#3Corroded connector$40-$150

20%

Moisture and corrosion at the connector cause a low signal.

#4PCM driver fault$200-$600

15%

The module output driver has shorted internally.

🩺 Common Symptoms

Check engine light is on
EVAP readiness monitor incomplete
No drivability symptoms
Possible failed emissions test

💰 Repair Cost: DIY vs Shop

DIY Cost

$100-$300

Shop Cost

$180-$450

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2419

1Inspect the valve connector and harness for chafing and corrosion.

2Check the control circuit for a short to ground with the valve unplugged.

3Measure the valve solenoid resistance against specification.

4Replace the valve if shorted, clear the code, and retest.

❓ Frequently Asked Questions

What does a low control circuit indicate?

Usually a short to ground in the wiring or a shorted valve solenoid pulling the voltage below normal.

Is driving safe?

Yes. This is an emissions code and does not affect how the car runs.

How do I confirm the valve is bad?

Measure the solenoid resistance with a multimeter and compare it to the service manual value.

🔗 Related Codes

P2418P2420P2401P0455P0446