What Does P3495 Mean?
The PCM detected abnormally low voltage in cylinder 12's exhaust valve control circuit. This indicates a short to ground or excessive current draw in the control system.
Common Causes
35%
Short to ground in wiring harness
30%
Failed exhaust valve control solenoid with internal short
20%
Damaged connector causing terminal short to ground
10%
Water intrusion causing corrosion and shorts
5%
Failed PCM output driver circuit
Diagnostic Steps
1
Step 1: Disconnect exhaust valve control solenoid and measure resistance to ground; should show infinite resistance (open)
2
Step 2: Check wiring harness for chafing, damage, or contact with hot engine components
3
Step 3: Inspect connector for water intrusion, corrosion, or bent pins causing shorts
4
Step 4: Measure solenoid resistance (should be 5-15 ohms); very low resistance indicates internal short
5
Step 5: Test PCM circuit by monitoring voltage at disconnected harness connector with key on
Estimated Repair Cost
$150 - $750
Parts + labor, varies by vehicle and location
The PCM detected abnormally low voltage in cylinder 12's exhaust valve control circuit. This indicates a short to ground or excessive current draw in the control system.
The most common cause of P3495 (Cylinder 12 Exhaust Valve Control Circuit Low) is: Short to ground in wiring harness
Typical repair costs for P3495 range from $150 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but cylinder deactivation will not function. May experience reduced fuel economy and slight performance loss.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3495 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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