Camshaft Position Sensor B Circuit (Bank 2)
The P0390 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Sensor B Circuit (Bank 2). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $60 - $350 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Engine may run rough
- Hard starting
- Possible loss of power
Probable Causes (Ranked by Likelihood)
- Faulty camshaft position sensor B (Bank 2) Very High
- Damaged sensor wiring High
- Corroded connector Moderate
- PCM input fault Low
Step-by-Step Diagnostic Procedure
-
Check cam sensor B Bank 2 signal on scan tool.
-
Measure sensor resistance.
-
Inspect connector and wiring.
-
Swap sensors between banks if same part number.
Frequently Asked Questions
What is cam sensor B on Bank 2?
On engines with dual overhead cams, sensor B typically monitors the exhaust camshaft on Bank 2.
Is P0390 the same as P0345?
They are related but different. P0345 is a general Bank 2 cam sensor code, while P0390 specifically refers to cam sensor B on Bank 2.
Can I drive with P0390?
Short distances. The engine may have reduced performance but should run.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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