What Does P1551 Mean?
The camshaft position actuator control circuit for Bank 1 intake camshaft is open. Variable valve timing will not function, reducing engine performance and fuel economy.
Common Causes
40%
Failed VVT solenoid or oil control valve
25%
Open circuit in wiring harness to VVT solenoid
20%
Corroded or disconnected electrical connector
10%
Low engine oil level or incorrect oil viscosity
5%
PCM internal driver circuit failure
Diagnostic Steps
1
Step 1: Check engine oil level and condition; verify correct viscosity
2
Step 2: Inspect VVT solenoid connector for damage or corrosion
3
Step 3: Measure VVT solenoid resistance (typically 6-12 ohms)
4
Step 4: Check wiring continuity between PCM and VVT solenoid
5
Step 5: Test for proper voltage supply at solenoid connector when commanded
Estimated Repair Cost
$120 - $500
Parts + labor, varies by vehicle and location
The camshaft position actuator control circuit for Bank 1 intake camshaft is open. Variable valve timing will not function, reducing engine performance and fuel economy.
The most common cause of P1551 ("A" Camshaft Position Actuator Control Open Circuit Bank 1) is: Failed VVT solenoid or oil control valve
Typical repair costs for P1551 range from $120 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No immediate safety concern but reduced performance and fuel economy. Engine may run rough at certain RPM ranges.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1551 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing
Difficulty
Type
Manufacturer
Recommended Tools
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