What are the common causes of P23F0?

A short to ground on the bank 2 camshaft B output wire. A failed bank 2 camshaft B position sensor. A grounded sensor return inside the harness. Contamination in the bank 2 sensor connector.

Read bank 2 camshaft B position on a scan tool. Test the sensor output wire for a short to ground. Check the sensor return circuit. Inspect the bank 2 connector for contamination. Replace the bank 2 camshaft B position sensor if the circuit tests good. Clear the code and retest.

P23F0

Camshaft B Position Signal Output Circuit Low Bank 2

System: Ignition and misfire (P code)
Lamp: Check Engine Light
Category: Powertrain - Ignition

What it means

P23F0 means Camshaft B Position Signal Output Circuit Low Bank 2.

Check these first

A short to ground on the bank 2 camshaft B output wire
A failed bank 2 camshaft B position sensor
A grounded sensor return inside the harness
Contamination in the bank 2 sensor connector

What to do next

Read bank 2 camshaft B position on a scan tool
Test the sensor output wire for a short to ground
Check the sensor return circuit
Inspect the bank 2 connector for contamination
Replace the bank 2 camshaft B position sensor if the circuit tests good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.