P0347
Camshaft Position Sensor A Circuit Low Input (Bank 2)
Powertrain Ignition System Camshaft Timing Control 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The engine's camshaft position sensor on bank 2 is sending a weak electrical signal to the computer, like a walkie-talkie with a dying battery that can barely be heard. The ECU can't properly read the cam timing and triggers this fault code.

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Symptoms You May Notice
3 known symptoms for this code
Check Engine Light illuminated
Rough idle or hesitation during acceleration
Reduced fuel economy and possible stalling
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the voltage signal from the camshaft position sensor circuit on Bank 2. The sensor should produce a signal within a specific voltage range as the camshaft rotates. When the signal voltage drops below the minimum threshold, the ECU detects a low input condition and stores this fault code.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Sensor Signal Voltage 0.5V to 4.5V (varies by sensor type) Below 0.5V or open circuit
Signal Frequency/Pattern Consistent pulses matching crankshaft rotation Erratic, missing, or no pulses detected
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness and connectors
Inspect and clean the camshaft sensor connector on Bank 2 and check wiring for corrosion or loose connections.
2
Camshaft Position Sensor (Bank 2)
Replace the sensor if connections are clean; most sensors cost under $100 and take 30 minutes to swap.
3
Engine control module software update
Check manufacturer for ECU reprogramming or updates that may resolve sensor calibration issues.