Camshaft Position Sensor B Circuit Low (Bank 2)
The P0392 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Sensor B Circuit Low (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 runs rough on Bank 2
- Reduced power
- Possible stalling
Probable Causes (Ranked by Likelihood)
- Short to ground in cam sensor B wiring Very High
- Failed sensor (shorted) High
- Corroded connector Moderate
- PCM input shorted Low
Step-by-Step Diagnostic Procedure
-
Measure cam sensor B signal voltage.
-
Disconnect sensor and check for short to ground.
-
Inspect connector.
-
Replace sensor if shorted internally.
Frequently Asked Questions
What causes circuit low on cam sensor B?
A short to ground in the sensor wiring or an internally failed sensor.
Is Bank 2 cam sensor hard to access?
On V-engines, Bank 2 sensors are often at the rear of the engine near the firewall, making access more difficult.
Can I test the sensor with a multimeter?
Yes, check resistance and look for shorts to ground. However, an oscilloscope gives a more complete picture of sensor health.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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