P0347
Fix within a few daysYour engine's Bank 2 Camshaft Position Sensor 'B' is sending a low voltage signal to the computer.
Code P0347 means your engine's Bank 2 Camshaft Position Sensor "B" has a low signal. Common causes: Bad sensor (60%), wiring issues (30%). Drivability: Yes, for short trips only. Repair cost: $50-$200 DIY, $150-$500 professional.
Can I Drive With P0347?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy traffic due to potential stalling.
Stop driving immediately if: Engine stalls repeatedly, will not start, or you experience significant power loss.
Symptoms of P0347
- 1Engine cranks but won't start
- 2Engine stalls unexpectedly
- 3Rough idle or poor engine performance
- 4Reduced engine power or acceleration
- 5Check Engine Light is on
Common Causes of P0347
Parts most likely causing this code, ranked by probability
The sensor itself has failed internally and is no longer sending a proper signal to the engine computer.
60% of P0347 cases are fixed by replacing this part
Damaged, corroded, or loose wiring or a faulty connector to the camshaft position sensor can cause a low input signal.
30% of P0347 cases are fixed by repairing wiring or connectors
A rare but possible cause is a faulty engine computer that cannot correctly process the sensor's signal or provide proper reference voltage.
5% of P0347 cases are fixed by replacing the ECM/PCM
A stretched timing chain or jumped timing can cause the camshaft to be out of sync, leading the sensor to report an incorrect or low signal.
5% of P0347 cases are fixed by addressing timing component issues
Check These First (Before Buying Parts)
- Visually inspect the electrical connector at the Bank 2 Camshaft Position Sensor 'B' for any looseness, corrosion, or damage.
- Check the wiring harness leading to the sensor for any obvious signs of chafing, cuts, or pinches.
How to Diagnose P0347
- 1Visually inspect the camshaft position sensor (Bank 2, Sensor B) and its electrical connector for any damage, corrosion, or loose connections.
- 2Check the wiring harness leading to the sensor for any signs of fraying, cuts, or pinches.
- 3Using a multimeter, test the sensor's resistance and voltage output according to your vehicle's service manual specifications.
- 4If possible, use a scan tool with live data to monitor the camshaft position sensor's signal while cranking or running the engine.
- 5If the sensor tests bad or the wiring is confirmed faulty, replace the sensor or repair the wiring.
P0347 on Popular Vehicles
Honda Accord
2003-2024Honda V6 engines (J-series) are known for camshaft position sensor failures. The sensor or its connector can become faulty, leading to starting issues or stalling. Bank 2 is typically the rear bank (firewall side).
70% fixed by replacing the sensor
Ford F-150
2004-2024On Ford trucks, especially with V8 engines, P0347 can point to a failing sensor or wiring issues due to heat and vibration. Bank 2 is the driver's side on V-engines. Sometimes, VVT solenoid issues can indirectly affect sensor readings, but the sensor itself is the primary suspect.
65% fixed by replacing the sensor or repairing wiring
Chevrolet Silverado
2007-2024Chevrolet trucks with V8 engines can experience P0347 due to sensor failure or wiring harness damage. The sensor is usually accessible, but proper diagnosis is key to rule out other electrical issues.
60% fixed by replacing the sensor
Frequently Asked Questions
What does P0347 mean?
P0347 indicates that your vehicle's engine computer has detected a low voltage input from the Camshaft Position Sensor 'B' on Bank 2. This sensor monitors the camshaft's position, which is crucial for engine timing and fuel injection.
Can I drive with P0347?
Yes, for short trips only. A P0347 code can cause your engine to stall unexpectedly, have difficulty starting, or run poorly. Driving long distances or ignoring this code increases your risk of being stranded or causing further engine issues.
Will P0347 clear itself?
No, P0347 will not clear itself. This code indicates a hard fault with a sensor or its circuit. The Check Engine Light will remain on until the underlying problem is diagnosed and repaired, and the code is manually cleared with a scan tool.
How do I fix P0347 myself?
Start by inspecting the camshaft position sensor (Bank 2, Sensor B) and its wiring for visible damage or corrosion. If the wiring looks good, test the sensor with a multimeter. If the sensor is faulty, replacing it is often a straightforward DIY job, usually requiring basic hand tools.
How much does it cost to fix P0347?
DIY repair costs for P0347 typically range from $50 to $200, primarily for a new camshaft position sensor. Professional repair at a shop will cost between $150 and $500, including parts and labor for diagnosis and replacement.
P0347 keeps coming back - why?
If P0347 keeps returning, it means the root cause was not fully addressed. Common reasons include: a faulty wiring harness that was not properly repaired, a poor quality replacement sensor, an intermittent connection, or a deeper issue like a failing engine computer or stretched timing chain that was overlooked.
Will P0347 fail emissions/smog test?
Yes, P0347 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on, regardless of the code, is an automatic failure in most states. Additionally, a faulty camshaft position sensor can directly impact engine efficiency and emissions.
What's the difference between P0347 and P0340?
P0347 specifically refers to a low input signal from the Camshaft Position Sensor 'B' on Bank 2 of your engine. P0340 refers to a general circuit malfunction for Camshaft Position Sensor 'A' on Bank 1. They both indicate a problem with a camshaft position sensor, but for different banks or sensors.
P0347 on Honda Accord?
On many Honda Accord models, especially those with V6 engines, the camshaft position sensors are a known failure point. The sensor itself or its wiring connector can degrade over time. Diagnosis often involves checking the sensor's signal with a scope or multimeter, and replacement is a common fix.
Questions to Ask Your Mechanic
Did you check the voltage signal from the Bank 2 Camshaft Position Sensor 'B' with a multimeter or oscilloscope?
Good answer: Yes, I checked the signal and it was consistently below the specified range, indicating a faulty sensor or an issue with its circuit.
What did you find when inspecting the wiring harness and connector for the Bank 2 Camshaft Position Sensor 'B'?
Good answer: I found no visible damage or corrosion on the wiring or connector, and continuity tests confirmed the circuit is intact.
Repair Cost Estimate
DIY Repair
Parts only
$50-$200
Shop Repair
Parts + labor
$150-$500
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic diagnostic tools like a multimeter and some mechanical aptitude to locate and replace the sensor.
Cost of Waiting
Ignoring P0347 can lead to your engine stalling unexpectedly, difficulty starting, or a complete no-start condition, leaving you stranded. While it won't directly destroy your engine, the inconvenience and safety risk are significant. A $100 sensor fix now prevents a tow bill and potential further diagnostic costs later.
While You're In There...
While not directly related to P0347, both camshaft and crankshaft sensors work together for engine timing. If one is failing, the other might be nearing its end of life, and replacing both can prevent future issues.
If the camshaft position sensor requires removal of the valve cover for access, it's smart to replace the valve cover gasket to prevent oil leaks and avoid repeat labor.
Tools You'll Need
- Basic socket/wrench set
- Screwdriver set
- Multimeter
- Wire strippers/crimpers (if wiring repair is needed)
- Scan tool (for clearing codes and live data)
P0347 is a common sensor code. Most repairs involve replacing a relatively inexpensive part, and your engine will run smoothly and reliably afterward.
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Your Next Steps
Step 1: Visually inspect the Bank 2 Camshaft Position Sensor 'B' connector and wiring for any damage, corrosion, or loose connections. Ensure the connector is fully seated.
Step 2: If the visual inspection doesn't reveal an obvious issue, use a multimeter to test the sensor's output and resistance. Compare readings to your vehicle's service manual specifications.
Step 3: If the sensor tests faulty, replace the Camshaft Position Sensor (Bank 2, Sensor B). You'll likely need a new sensor and possibly a new O-ring or gasket.