What Does P3462 Mean?
The PCM detects that cylinder 8 exhaust valve control system is not performing within expected parameters during deactivation. The exhaust valve control mechanism is responding but not meeting timing, pressure, or operational specifications.
Common Causes
35%
Sticking or binding exhaust valve lifter mechanism on cylinder 8
25%
Low engine oil pressure or incorrect oil viscosity affecting hydraulic valve control
20%
Exhaust valve control solenoid worn or operating sluggishly
15%
Blocked oil passages or restricted oil flow to cylinder 8 exhaust valve mechanism
5%
Mechanical wear in exhaust valve deactivation lifter assembly
Diagnostic Steps
1
Step 1: Verify engine oil level and condition; ensure correct oil grade is being used per manufacturer specifications
2
Step 2: Connect mechanical oil pressure gauge and verify oil pressure meets specifications at idle and 2000 RPM
3
Step 3: Remove valve cover and manually inspect cylinder 8 exhaust lifter and rocker assembly for binding or mechanical damage
4
Step 4: Use scan tool to command cylinder 8 exhaust valve deactivation while monitoring response time and system behavior
5
Step 5: Remove exhaust valve control solenoid and inspect internal screen for debris; test solenoid operation on bench with 12V power
Estimated Repair Cost
$200 - $1,300
Parts + labor, varies by vehicle and location
The PCM detects that cylinder 8 exhaust valve control system is not performing within expected parameters during deactivation. The exhaust valve control mechanism is responding but not meeting timing, pressure, or operational specifications.
The most common cause of P3462 (Cylinder 8 Exhaust Valve Control Circuit Performance) is: Sticking or binding exhaust valve lifter mechanism on cylinder 8
Typical repair costs for P3462 range from $200 to $1,300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving. Expect reduced fuel economy and possible rough idle or hesitation during cylinder deactivation mode transitions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3462 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
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