What Does P3455 Mean?
The PCM has detected a voltage signal lower than expected in the cylinder 7 exhaust valve control circuit. This indicates a short to ground or excessive current draw in the exhaust valve deactivation solenoid circuit.
Common Causes
40%
Short to ground in wiring harness to cylinder 7 exhaust valve solenoid
35%
Failed cylinder 7 exhaust valve control solenoid with internal short circuit
15%
Damaged or corroded connector causing short to ground
10%
PCM driver circuit failure
Diagnostic Steps
1
Step 1: Disconnect cylinder 7 exhaust valve solenoid connector and measure solenoid resistance; compare to specifications
2
Step 2: With solenoid disconnected, check for continuity between control wire and ground; should be infinite resistance (no continuity)
3
Step 3: Inspect wiring harness for damage, particularly where it contacts engine block or hot components
4
Step 4: Examine connector terminals for corrosion, moisture, or damage that could cause intermittent shorts
5
Step 5: If wiring and solenoid are intact, test PCM driver circuit output; may require PCM replacement if driver circuit is damaged
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The PCM has detected a voltage signal lower than expected in the cylinder 7 exhaust valve control circuit. This indicates a short to ground or excessive current draw in the exhaust valve deactivation solenoid circuit.
The most common cause of P3455 (Cylinder 7 Exhaust Valve Control Circuit Low) is: Short to ground in wiring harness to cylinder 7 exhaust valve solenoid
Typical repair costs for P3455 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short distances. May cause rough idle, reduced fuel economy, and possible misfires on cylinder 7.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3455 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
