P0347
Camshaft Position Sensor A Circuit Low Input (Bank 2)
The appearance of the standard OBD2 trouble fault code P0347 is an indicator that your vehicle ECU triggered a threshold alert for "Camshaft Position Sensor A Circuit Low Input (Bank 2)". Understanding the root component breakdown helps avoid expensive diagnostic fees.
Driver's Summary
Your vehicle's computer logged P0347 after detecting a malfunction in the camshaft position sensor a circuit low input (bank 2) system. Drivers typically experience engine stalling, check engine light, extended cranking when this code is active. This condition is classified as high severity. Prompt diagnosis is essential to prevent cascading damage to related components.
Symptoms
Engine stalling, check engine light, extended cranking
Common Causes
- Short to ground in sensor wiring
- Defective Bank 2 camshaft sensor
- Failed PCM sensor ground
- Low battery voltage
How to Fix
- 1 Repair short to ground
- 2 Replace Bank 2 cam sensor
- 3 Test PCM ground circuit
- 4 Test battery
Technical Explanation
Detection of P0347 occurs when the ECM cross-references multiple sensor inputs and determines that the reported values are physically inconsistent or out-of-range. Misfire rate is counted per cylinder over rolling windows and compared against two thresholds: a catalyst-damaging rate (triggers flashing MIL) and an emissions-exceeding rate (triggers solid MIL). The PCM logs which cylinder is misfiring based on crankshaft position at the time of each detected event. The MIL illuminates after the fault is confirmed on two consecutive drive cycles, and the freeze frame data captured at first detection is stored in the PCM's memory for diagnostic reference.
Is It Safe to Drive?
An active P0347 code under high-severity conditions means the affected system is operating outside safe parameters. Continued driving — especially under load or at highway speeds — significantly increases the risk of secondary damage to components like defective bank 2 camshaft sensor.
Mechanic's Pro Tip
Module replacement should always be the last resort for P0347 after exhaustively verifying all power supply circuits, ground connections, and communication bus wiring. Use a wiring diagram to locate all fuses, relays, and ground points for the affected module, and measure voltage drop on each ground with the circuit loaded. A module "failure" is frequently a corroded ground eyelet or a weak battery causing brownout conditions — fix these first and you'll save hundreds of dollars on an unnecessary module replacement.
Related Fault Codes
Frequently Asked Questions
What does OBD2 code P0347 mean?
OBD2 code P0347 refers to Camshaft Position Sensor A Circuit Low Input (Bank 2). The appearance of the standard OBD2 trouble fault code P0347 is an indicator that your vehicle ECU triggered a threshold alert for "Camshaft Position Sensor A Circuit Low Input (Bank 2)". Understanding the root component breakdown helps avoid expensive diagnostic fees.
What are the most common symptoms of DTC P0347?
Drivers experiencing code P0347 typically report: Engine stalling, check engine light, extended cranking.
Is it safe to drive with trouble code P0347 active?
An active P0347 code under high-severity conditions means the affected system is operating outside safe parameters. Continued driving — especially under load or at highway speeds — significantly increases the risk of secondary damage to components like defective bank 2 camshaft sensor.
How much does it cost to fix code P0347?
The estimated repair cost for P0347 ranges from $80 to $300 USD. Sensor replacement: 100 - 250
Sensor replacement: 100 - 250
Need Professional Diagnostic Assistance?
Always verify sensor signals and wiring integrity with an OBD2 scanner before purchasing replacement parts.
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