BMW P0345: Camshaft Position Sensor A Circuit Bank 2 — Diagnosis and Repair

P0345 means Camshaft Position Sensor A Circuit Bank 2. The DME stores it when Bank 2 intake-cam position signal no longer matches the monitored operating state. Treat the record as a measured conclusion, then preserve Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target before clearing evidence or replacing a component. What Does P0345 Mean? P0345 is the standardized OBD-II definition for Camshaft Position Sensor A Circuit Bank 2. On a BMW, the decisive evidence comes from Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target. The code identifies the failed monitor, but it does not prove which individual wire, component, hydraulic path, or mechanical part caused that monitor to fail. P0345 concerns the electrical signal from Bank 2 intake camshaft Sensor A; it is not proof that the timing chain or VANOS actuator has failed. Confirm the installed engine, transmission, module, and wiring through the VIN before choosing a test point. Freeze-frame order matters because a supporting code recorded earlier can reveal whether this record is primary or only a consequence. Code: P0345 Definition: Camshaft Position Sensor A Circuit Bank 2 Module: DME Key data: Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target Typical cause: Oil inside the Bank 2 intake-cam connector interrupts the sensor signal before any expensive mechanical fault is considered. Severity: condition dependent Note: confirm architecture and test points by VIN P0345 identifies Camshaft Position Sensor A Circuit Bank 2. What Are the Symptoms of P0345? The measurable symptoms of P0345 must follow the behavior of Bank 2 intake-cam position signal, not a generic warning-lamp list. Compare the stored transition with a stable reference condition and look for a trace that changes late, stays fixed, drops out, or disagrees with its commanded state. These observations narrow the fault before parts are disturbed. • Bank 2 intake-cam angle freezes while the commanded VANOS target continues changing during a controlled rev sweep. • Crank synchronization remains valid, but the Bank 2 intake-cam status changes intermittently from recognized to unavailable. • The engine cranks longer after heat soak when the cam sensor waveform loses amplitude at high temperature. • Bank 1 intake angle tracks normally while the matching Bank 2 trace drops out, isolating the affected side. • Gentle movement of the rear-bank sensor harness produces sudden angle jumps without a corresponding engine-speed change. • A clean fixed phase offset suggests mechanical timing, whereas missing signal edges support the P0345 electrical diagnosis. Why Does P0345 Occur? Causes of P0345 should be checked from accessible evidence toward expensive internal work. Begin with fluid level, connector condition, routing, shared supply, and component response that actually belong to Bank 2 intake-cam position signal. Escalate only when loaded electrical tests and live-data behavior exclude those paths; an expensive assembly is not the first diagnostic assumption. • Oil inside the Bank 2 intake-cam connector interrupts the sensor signal before any expensive mechanical fault is considered. • Harness insulation rubs against the cylinder-head edge and intermittently shorts the cam signal to ground. • A weak sensor supply or ground connection distorts all three-wire readings when the engine vibrates. • The Bank 2 intake-cam sensor develops temperature-dependent internal failure and stops producing clean edges. • A damaged reluctor target creates repeatable missing pulses at the same camshaft position despite sound wiring. • The DME input stage is plausible only when a correct waveform arrives at its connector but no angle is recognized. How Is P0345 Diagnosed with OBDThink? OBDThink is an independent BMW coding and diagnostics app and is not affiliated with BMW AG. Use it to preserve the complete scan and graph Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target. Work from the event chronology, confirm the VIN-specific architecture, and reproduce only safe operating conditions. OBDThink supplies observations; physical measurements and the applicable BMW test plan confirm the repair decision. • 1. Save Bank 2 intake angle, VANOS target, synchronization, engine speed, temperature, and companion DTCs before clearing. • 2. Confirm through VIN data that Sensor A is the intake camshaft and identify the true Bank 2 location. • 3. Compare Bank 1 and Bank 2 intake-angle traces through idle and a gentle controlled speed increase. • 4. Inspect the rear-bank sensor plug for oil migration, loose terminals, and a broken connector lock. • 5. Measure sensor supply and ground under load rather than trusting an unloaded continuity result. • 6. Capture cam and crank waveforms together during the temperature or vibration condition that triggers dropout. • 7. Check whether missing edges repeat at one mechanical position before replacing an electronically responsive sensor. • 8. Consider the DME input only after the same clean waveform is verified at both sensor and controller. IF the commanded state changes AND the measured Bank 2 intake-cam position signal trace stays fixed, THEN test the component connector under load. ELSE IF the trace changes at the connector but not at the DME, THEN test the intervening harness. ELSE compare the physical response with Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target before authorizing an expensive repair. The fastest split is to graph Bank 2 intake-cam angle. How Is P0345 Repaired? Repair P0345 only after one test isolates the failed path in Bank 2 intake-cam position signal. Restore terminals, seals, routing, fluid condition, or wiring before replacing a sensor, valve, actuator, module, or mechanical assembly. After the work, repeat the original operating condition and compare the same data channels rather than accepting a cleared code as proof. • Low cost: clean oil from the Bank 2 intake-cam connector and renew its failed seal. • Low cost: restore terminal tension where harness movement changes the recognized camshaft angle. • Moderate cost: repair the rubbed signal, supply, or ground conductor near the cylinder-head edge. • Moderate cost: replace the intake-cam sensor after captured heat-related waveform loss confirms failure. • High cost: repair the reluctor or mechanical timing only when repeatable phase evidence proves damage. • High cost: service the DME after a correct cam waveform reaches its input without recognition. After repair, confirm that P0345 no longer occurs, the original transition is stable, and the relevant monitor completes. Can You Drive with P0345? Driving with P0345 depends on the failure described by Camshaft Position Sensor A Circuit Bank 2. Use the stored data and current behavior to decide whether a short, gentle trip is defensible. Do not rely on the warning lamp alone: loss of lubrication, stalling, severe slip, fuel vapor, or unstable control requires a more conservative response. If operation remains smooth and no red safety warning is present, travel only far enough for qualified diagnosis while avoiding the load that triggered the event. Stop immediately when the condition worsens, a new noise or odor appears, temperature rises abnormally, or the vehicle can no longer accelerate and engage predictably. P0345 identifies Camshaft Position Sensor A Circuit Bank 2. Avoid long trips when synchronization drops out; stop for chain noise, severe misfire, stalling, or an oil-pressure warning. Which Questions Are Frequently Asked? The common questions about P0345 concern whether clearing it is a repair, which component should be tested first, and how recurrence is confirmed. The answers depend on the specific monitor and its recorded evidence. A complete scan, reproducible data trace, and post-repair drive under the original condition provide the reliable sequence. • Can P0345 clear by itself? The DTC may become inactive after several passing drive cycles, but that does not repair an intermittent fault. Preserve the original freeze frame and investigate any repeatable deviation. P0345 identifies Camshaft Position Sensor A Circuit Bank 2. • Should the named component be replaced first? No. Test its connector, supply, command, feedback, and physical response in the Bank 2 intake-cam position signal context before ordering a part. • How is the repair confirmed? Repeat the stored operating condition and verify that Bank 2 intake-cam angle, crank synchronization, sensor supply, signal waveform, and VANOS target remain coherent. Confirm that P0345 no longer occurs and that its monitor completes without a new companion fault. Use the evidence chain from the first stored event to choose the next measurement for P0345. Once the repaired Bank 2 intake-cam position signal response matches its command through the original transition, document the final scan and keep that trace as the baseline for future diagnosis.