Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the computer in the car is having trouble controlling the exhaust valve on the first cylinder of the engine. It's like if a switch for a light bulb isn't working right, so the light doesn't turn on or off properly.
The P3407 code indicates a problem with the control circuit for the exhaust valve on cylinder 1. The circuit is reporting a low voltage condition, which means the valve may not be operating as intended.
The P3407 code is triggered when the Powertrain Control Module (PCM) detects a low voltage condition in the exhaust valve control circuit for cylinder 1. This can affect the variable valve timing system, leading to suboptimal engine performance.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty exhaust valve solenoid
• Wiring issues such as a short or open circuit
• Malfunctioning PCM
PCM: Powertrain Control Module, the computer that controls engine and transmission functions
Solenoid: An electromechanical device used to control a valve
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the exhaust valve solenoid for proper operation
• Replace the exhaust valve solenoid if faulty
• Repair or replace damaged wiring
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Socket set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance checks
• Timely replacement of faulty components
• Ensuring clean and secure electrical connections
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage
• Have the vehicle inspected by a professional mechanic
Repairs may be covered under the vehicle's powertrain warranty if applicable.
This code is commonly associated with vehicles using Active Fuel Management systems, which can deactivate cylinders to improve fuel efficiency.
Moderate – It's important to address this issue to avoid reduced engine performance and potential engine damage.
Driving with a malfunctioning engine can lead to safety hazards and may not be compliant with emissions regulations.
• Engine at operating temperature
• Vehicle in park or neutral with parking brake engaged
The exhaust valve solenoid for cylinder 1 is typically located on or near the engine cylinder head.
Q: Can I drive my car with a P3407 code?
A: It's not recommended to drive with this code active as it can lead to reduced performance and potential engine damage.
Q: How serious is a P3407 code?
A: While not immediately critical, it should be addressed soon to prevent further issues.
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