P0345
Camshaft Position Sensor A Circuit (Bank 2)
Powertrain Ignition System Camshaft Sensor Bank 2 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The engine computer can't read the camshaft position sensor on the right side of the engine (Bank 2), similar to losing one eye's vision so your depth perception suffers. Without this signal, the engine can't properly time fuel injection and ignition.

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

The ECM monitors voltage signals from the camshaft position sensor on Bank 2 to synchronize fuel injection and spark timing with valve opening. The sensor should produce a clean digital or analog signal at specific RPM intervals; a missing, weak, or erratic signal triggers the fault code.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Sensor Signal Voltage 0.5–4.5V varying with cam rotation No signal, constant voltage, or voltage out of range
Signal Frequency/Timing Synchronized pulses matching crankshaft position Missing pulses or signal dropout detected
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
CMP sensor connector and wiring
Inspect the connector on Bank 2 camshaft sensor for corrosion, loose pins, or damaged wires; clean and reseat firmly.
2
Camshaft Position Sensor (Bank 2)
Unbolt the sensor from the cylinder head on Bank 2, inspect the tip for debris or damage, clean or replace if faulty.
3
Engine control module (ECM) software
If wiring and sensor are good, perform a full system scan and ECM reprogramming at a dealer to rule out module corruption.