Camshaft Position Sensor 'B' Circuit Range/Performance Problem (Bank 3)

The engine's computer isn't getting a proper signal from the camshaft position sensor on bank 3, which helps it know the position of the camshaft for timing the engine correctly.

The PCM expects a consistent voltage signal (typically between 0.5 to 4.5 volts) from the camshaft position sensor. If it sees signals that are too low, too high, or inconsistent, it triggers this code.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 1Check wiring and connectors to the camshaft position sensor. Look for frays, corrosion, or loose connections.
2. 2Using a multimeter, measure the voltage coming from the camshaft position sensor. You should see around 2.5V at idle.
3. 3If the voltage is out of range, replace the camshaft position sensor and retest.
4. 4If voltage is normal, check the pulse pattern with an oscilloscope; you should see a square wave pattern.
5. 5Inspect the timing chain/belt for wear or misalignment; check that timing marks are aligned properly.

• Faulty camshaft position sensor for bank 3
• Damaged wiring or connectors in the camshaft position sensor circuit
• Timing chain/belt issues affecting camshaft position
• PCM (Powertrain Control Module) malfunction

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