What Does P3422 Mean?
The PCM detected that the cylinder 3 exhaust valve control system is not responding as expected during commanded operation. The circuit is intact but the mechanical or hydraulic response is incorrect.
Common Causes
30%
Low engine oil level or pressure affecting hydraulic valve control
25%
Clogged or stuck cylinder 3 exhaust valve control solenoid
20%
Mechanical failure of exhaust valve deactivation mechanism
15%
Contaminated or incorrect engine oil viscosity
10%
Worn or damaged exhaust valve control solenoid screen/filter
Diagnostic Steps
1
Step 1: Check engine oil level and condition; ensure proper viscosity and fill level
2
Step 2: Monitor oil pressure with mechanical gauge during valve control operation
3
Step 3: Remove and inspect cylinder 3 exhaust valve control solenoid for debris or varnish buildup
4
Step 4: Check solenoid screen/filter for blockage and clean if necessary
5
Step 5: Perform valve deactivation system functional test using scan tool to verify mechanical operation
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM detected that the cylinder 3 exhaust valve control system is not responding as expected during commanded operation. The circuit is intact but the mechanical or hydraulic response is incorrect.
The most common cause of P3422 (Cylinder 3 Exhaust Valve Control Circuit Performance) is: Low engine oil level or pressure affecting hydraulic valve control
Typical repair costs for P3422 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but fuel economy will be reduced. Potential for increased engine noise or vibration during deactivation attempts.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3422 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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