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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What Are the Symptoms of P0390?
- Check Engine Light on
- Engine may run rough
- Hard starting
- Possible loss of power
What Causes P0390? (Most Likely First)
- Faulty camshaft position sensor B (Bank 2) Very High
- Damaged sensor wiring High
- Corroded connector Moderate
- PCM input fault Low
Can I Still Drive with P0390?
Short distances only. P0390 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
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.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0390?
-
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.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0390?
- 2010-2020 Ford F-150 (3.5L EcoBoost)
- 2012-2019 Chevrolet Silverado (5.3L V8)
- 2008-2018 Toyota Tundra (5.7L V8)
- 2011-2020 Ram 1500 (5.7L HEMI)
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