What Does P3464 Mean?
The PCM has detected a higher than expected voltage in the control circuit for cylinder 8's exhaust valve. This code applies to engines with variable valve timing or cylinder deactivation systems where exhaust valve operation is electronically controlled.
Common Causes
35%
Short to voltage in exhaust valve control solenoid wiring harness
30%
Failed exhaust valve control solenoid for cylinder 8
20%
PCM internal driver circuit failure
10%
Corroded or damaged electrical connector pins
5%
Aftermarket electrical modifications causing voltage feedback
Diagnostic Steps
1
Step 1: Visually inspect cylinder 8 exhaust valve solenoid connector and wiring for damage, corrosion, or signs of shorting to power
2
Step 2: Disconnect exhaust valve control solenoid and measure resistance across solenoid terminals; compare to specifications
3
Step 3: With solenoid disconnected, check for voltage at harness connector; should show battery voltage during activation, otherwise check for short to power
4
Step 4: Perform PCM output test to command solenoid on/off and monitor voltage response at solenoid connector
5
Step 5: If all wiring and solenoid test normal, test PCM ground circuits and consider PCM internal fault
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has detected a higher than expected voltage in the control circuit for cylinder 8's exhaust valve. This code applies to engines with variable valve timing or cylinder deactivation systems where exhaust valve operation is electronically controlled.
The most common cause of P3464 (Cylinder 8 Exhaust Valve Control Circuit High) is: Short to voltage in exhaust valve control solenoid wiring harness
Typical repair costs for P3464 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may experience reduced power, rough idle, or poor fuel economy. Generally safe to drive short distances to a repair facility, but prolonged operation may cause catalytic converter damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3464 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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