What Does P002B Mean?
The ECM has detected a low voltage condition in the 'B' camshaft profile control solenoid circuit on Bank 1. This indicates the signal voltage is below the expected threshold, suggesting a short to ground or excessive resistance in the circuit. The driver may experience rough idle, loss of power, and illuminated Check Engine Light.
Common Causes
35%
Wiring shorted to ground between ECM and solenoid
30%
Faulty camshaft profile control solenoid (internally shorted)
20%
Corroded or damaged connector causing high resistance ground path
10%
ECM internal driver fault pulling circuit low
5%
Water intrusion in the connector or wiring junction
Diagnostic Steps
1
Monitor the 'B' camshaft profile solenoid voltage PID with live data. Commanded voltage versus actual voltage deviation will indicate the nature of the fault — a consistently low actual reading confirms the code.
2
Disconnect the solenoid connector and measure voltage on the ECM control wire with key on engine off. If the voltage is near 0V with the solenoid disconnected, the wire is shorted to ground somewhere in the harness.
3
Measure solenoid coil resistance — expect 7–13 ohms. Also measure from each solenoid terminal to the solenoid body (ground) — any reading under 10k ohms indicates an internal short to ground.
4
Inspect the wiring harness from the solenoid back to the ECM, checking for bare wires touching engine block, bracket, or other ground points. Pay special attention to where the harness passes near sharp edges or heat sources.
5
If wiring and solenoid test good, check for proper voltage supply (battery voltage) on the power feed wire at the solenoid connector with key on. Low supply voltage can also trigger this code.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
The ECM has detected a low voltage condition in the 'B' camshaft profile control solenoid circuit on Bank 1. This indicates the signal voltage is below the expected threshold, suggesting a short to ground or excessive resistance in the circuit. The driver may experience rough idle, loss of power, an...
The most common cause of P002B ("B" Camshaft Profile Control Circuit Low Bank 1) is: Wiring shorted to ground between ECM and solenoid
Typical repair costs for P002B range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle can be driven for short distances, but VVT will not function correctly, leading to reduced engine performance and fuel economy. Prolonged driving could potentially cause engine timing issues under load. Repair at your earliest convenience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P002B to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing
Difficulty
Type
Generic (SAE)
Recommended Tools
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