P0392
Fix within a few daysCamshaft Position Sensor 'B' Circuit Low (Bank 2)
Code P0392 means your engine's Bank 2 Camshaft Position Sensor "B" circuit has a low voltage signal. Common causes: Faulty cam sensor (80%), wiring issues (15%). Drivability: Yes, but fix within days due to potential stalling. Repair cost: $30-$150 DIY, $130-$450 professional.
Can I Drive With P0392?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy traffic where stalling would be dangerous.
Stop driving immediately if: Engine stalls repeatedly, significant power loss, or the Check Engine Light begins flashing.
Symptoms of P0392
- 1Engine cranks longer than usual before starting
- 2Engine stalls unexpectedly
- 3Rough idle or poor engine performance
- 4Reduced engine power or acceleration
- 5Poor fuel economy
- 6Engine misfires (less common, but possible)
Common Causes of P0392
Parts most likely causing this code, ranked by probability
The sensor itself is faulty, sending a low voltage signal to the engine computer.
80% of P0392 cases are fixed by replacing this part
Damaged wires, corrosion, or a loose connection can prevent the correct signal from reaching the engine computer.
15% of P0392 cases are fixed by repairing wiring or connectors
A rare internal fault within the engine computer can cause it to misinterpret or fail to process the sensor's signal.
5% of P0392 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the Camshaft Position Sensor 'B' (Bank 2) and its electrical connector for any visible damage, corrosion, or loose connections. Ensure the connector is fully seated.
- Check for any obvious signs of rodent damage to the wiring harness near the sensor.
How to Diagnose P0392
- 1Visually inspect the camshaft position sensor 'B' (Bank 2) and its wiring harness for any obvious damage, fraying, or loose connections.
- 2Check the electrical connector for corrosion or bent pins.
- 3Using a multimeter, test the voltage at the sensor connector to ensure it's receiving proper power and ground.
- 4If possible, use a scan tool to monitor the live data from the camshaft position sensor 'B' (Bank 2) while cranking or running the engine.
- 5Test the resistance of the camshaft position sensor 'B' (Bank 2) itself, comparing it to manufacturer specifications.
P0392 on Popular Vehicles
Ford F-150
2004-2024On V8 engines, the camshaft position sensors are common failure points. Bank 2 is typically on the passenger side. Replacement is straightforward.
85% fixed by replacing the sensor
Chevrolet Silverado
2007-2024Similar to Ford, Silverado V8 engines can experience cam sensor failures. Bank 2 is usually the passenger side. Check for oil leaks around the sensor that could contaminate the connector.
80% fixed by replacing the sensor
Honda Accord
2003-2024For V6 Accord models, P0392 can indicate a faulty cam sensor on the rear bank (Bank 2). Access can be more challenging due to engine bay layout. Always check the connector for corrosion.
75% fixed by replacing the sensor
Frequently Asked Questions
What does P0392 mean?
P0392 indicates that the engine's computer has detected a low voltage signal from the Camshaft Position Sensor 'B' on Bank 2. This sensor helps the computer know the exact position of the camshaft for proper engine timing.
Can I drive with P0392?
Yes, you can drive, but limit driving and fix this within a few days. A failing camshaft position sensor can cause hard starting, stalling, or reduced engine power, which can be unsafe or leave you stranded.
Will P0392 clear itself?
No, P0392 will not clear itself. This code indicates a hard fault with a sensor or its circuit. The underlying issue must be diagnosed and repaired before the code will clear, either automatically after several drive cycles or by using a scan tool.
How do I fix P0392 myself?
Start by visually inspecting the sensor and its wiring for damage or loose connections. If the wiring looks good, replace the Camshaft Position Sensor 'B' on Bank 2. This often involves removing a bolt and unplugging a connector.
How much does it cost to fix P0392?
DIY repair for P0392 typically costs $30-$150 for a new camshaft position sensor. If you take it to a shop, expect to pay $130-$450, which includes parts and 1-2 hours of labor.
P0392 keeps coming back - why?
If P0392 keeps returning, the most common reasons are a faulty replacement sensor, an overlooked wiring issue (like a short or open circuit), or a problem with the sensor's tone ring on the camshaft. In rare cases, the ECM itself could be at fault.
Will P0392 fail emissions/smog test?
Yes, P0392 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most states, and this code directly impacts engine timing and performance, which are critical for emissions.
What's the difference between P0392 and P0340?
P0392 refers to a low circuit signal from Camshaft Position Sensor 'B' on Bank 2 of the engine. P0340 refers to a general circuit malfunction for Camshaft Position Sensor 'A' on Bank 1. The 'A' and 'B' typically denote intake and exhaust camshafts, while Bank 1 and Bank 2 refer to the cylinder banks on V-engines.
P0392 on Ford F-150?
On Ford F-150s with V8 engines, P0392 often points directly to a faulty Camshaft Position Sensor on Bank 2. These sensors are known to fail, leading to extended cranking or stalling. Inspecting the wiring is always a good first step, but sensor replacement is a common fix.
Questions to Ask Your Mechanic
Did you check the voltage and ground at the Camshaft Position Sensor 'B' (Bank 2) connector?
Good answer: Yes, I confirmed proper voltage and ground are present at the connector, indicating the wiring to the sensor is good.
What were the live data readings from the Camshaft Position Sensor 'B' (Bank 2) when you monitored it?
Good answer: The live data showed a flat line or erratic readings from the Bank 2 sensor, while Bank 1 was reading correctly, confirming the Bank 2 sensor is faulty.
Repair Cost Estimate
DIY Repair
Parts only
$30-$150
Shop Repair
Parts + labor
$130-$450
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate - requires basic hand tools and a multimeter for proper diagnosis. An OBD-II scan tool for live data is highly beneficial.
Cost of Waiting
Ignoring P0392 can lead to your engine stalling unexpectedly, which is a safety hazard. Continued driving with a faulty sensor can also cause poor fuel economy and reduced engine performance. While it won't directly damage major components, the inconvenience and safety risk are significant.
While You're In There...
Clean engine oil is crucial for proper VVT (Variable Valve Timing) operation, which cam sensors monitor. If you're already under the hood, it's a good maintenance item.
Tools You'll Need
- Basic hand tools (sockets, wrenches)
- Multimeter
- OBD-II scan tool (optional, but highly recommended for live data)
P0392 is a common sensor code. Most repairs involve replacing a relatively inexpensive part, and your engine will run smoothly again afterward.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the Camshaft Position Sensor 'B' (Bank 2) and its wiring harness. Look for frayed wires, melted insulation, or a loose/corroded connector.
Step 2: If the visual inspection doesn't reveal any issues, use a multimeter to test for proper voltage and ground at the sensor connector. If power is missing, trace the wiring back to the ECM.
Step 3: If power and ground are present, replace the Camshaft Position Sensor 'B' (Bank 2). You'll likely need a new sensor and possibly a new O-ring or gasket if applicable.