P0347
UniversalCamshaft Position Sensor A Circuit Low Input (Bank 2)
Medium SeverityThis code indicates that the engine's computer (ECM) has detected an abnormally low electrical signal from the Camshaft Position Sensor 'A' for engine Bank 2. This typically means the sensor is not sending accurate information about the camshaft's position, which is crucial for precise engine timing and fuel injection.
⚠️ Before You Begin (Safety First)
Always ensure the vehicle is parked on a level surface with the parking brake engaged. Allow the engine to cool completely before working on it to prevent burns. Disconnect the battery's negative terminal before performing any electrical work or replacing components to prevent accidental short circuits or electrical shock. Use proper personal protective equipment such as gloves and eye protection.
Common Symptoms
- Check Engine Light illuminated
- Engine cranks but does not start or hard starting
- Engine misfires or runs rough
- Reduced engine power
- Poor fuel economy
- Engine stalls, especially at idle
- Intermittent loss of power
Common Causes
- Faulty Camshaft Position Sensor (Bank 2, Sensor A)
- Damaged, corroded, or shorted wiring to the camshaft position sensor
- Poor electrical connection at the sensor connector
- Faulty Engine Control Module (ECM) (less common)
- Timing chain/belt issues (rare, but can affect sensor readings)
Frequently reported on: Toyota Camry (2007-2011), Honda Accord (2003-2007), Ford F-150 (2004-2008), Chevrolet Silverado (2007-2013), Nissan Altima (2007-2012)
Diagnostic Steps
- Locate the Camshaft Position Sensor A on Bank 2. (Bank 2 is typically the cylinder bank that does not contain cylinder #1. Sensor A usually refers to the intake camshaft sensor).
- Visually inspect the sensor's wiring harness and connector for any signs of damage, fraying, corrosion, or loose connections. Repair as needed.
- Clear the P0347 diagnostic trouble code from the ECM using an OBD-II scanner.
- Start the engine and check if the code returns. If it does, proceed with sensor replacement.
- Disconnect the vehicle's battery. Carefully unbolt and remove the old camshaft position sensor. Ensure the sealing O-ring is removed with the old sensor.
- Install the new camshaft position sensor, ensuring the O-ring is properly seated. Reconnect the electrical connector and secure the sensor.
- Reconnect the battery, start the vehicle, and re-check for codes. Test drive the vehicle to confirm the repair.
👨🔧 When to Call a Professional
If you have replaced the Camshaft Position Sensor and thoroughly inspected the wiring for damage, but the P0347 code persists, it is advisable to consult a professional mechanic. The issue could stem from a more complex wiring problem, a faulty engine control module (ECM), or an underlying mechanical timing issue that requires specialized diagnostic tools and expertise.
Commonly Asked Questions
What does 'Bank 2' mean for a P0347 code?
Bank 2 refers to the side of the engine that does NOT contain cylinder number one. In V6 or V8 engines, this specifies which camshaft position sensor is reporting the issue.
Can I drive my car with a P0347 code?
While you might be able to drive, it's not recommended. A faulty camshaft position sensor can lead to engine stalling, reduced power, and make your car unreliable, potentially leaving you stranded.
Is it difficult to replace a camshaft position sensor?
Replacing a camshaft position sensor is typically a medium difficulty DIY task. It usually involves basic hand tools, but accessibility to the sensor can vary greatly depending on your vehicle's make and model.
What if replacing the sensor doesn't fix the P0347 code?
If the code persists after replacing the sensor, the issue likely lies with the wiring harness connecting to the sensor, a poor electrical connection, or in rare cases, a problem with the engine's computer (ECM).
How do I identify 'Sensor A' on Bank 2?
Sensor A generally refers to the intake camshaft position sensor. You may need to consult your vehicle's service manual or a specific repair guide for the exact location of the Bank 2 Sensor A camshaft position sensor on your engine.