P0345
UniversalCamshaft Position Sensor A Circuit (Bank 2)
The engine computer has detected a problem in the circuit for camshaft position sensor A on bank 2. This sensor provides information about camshaft position, which the computer uses to coordinate engine operation. The code identifies a detected circuit condition; it does not by itself prove that the sensor needs replacement. Exact effects and diagnostic procedures depend on the vehicle, year, and engine.
⚠️ Before You Begin (Safety First)
If the engine runs very roughly, loses power, or stalls, stop driving when it is safe and arrange an inspection; an unexpected stall can create a road hazard. If the vehicle runs normally, avoid hard driving and have the fault diagnosed promptly.
Common Symptoms
- The check-engine light may be on, with no noticeable change in how the vehicle runs.
- Starting may take longer or the engine may fail to start if the computer cannot obtain a usable camshaft position signal.
- The engine may run roughly, misfire, or have reduced power if the signal problem disrupts engine control.
- The engine may stall or run intermittently if the circuit fault comes and goes.
Common Causes
- A loose, damaged, or contaminated connector or wiring in the Bank 2 sensor A circuit.
- An electrical supply, ground, or signal-path problem in the circuit.
- A camshaft position sensor that is faulty or producing an unreliable signal.
- A problem affecting the signal source or camshaft timing, if supported by other diagnostic findings.
Diagnostic Steps
- Record the code and any other stored codes before clearing anything; related codes can help show whether the issue affects a wider circuit or engine-control system.
- With the engine off and cool, visually inspect accessible wiring and the sensor connector for looseness, damage, corrosion, or oil contamination. Do not pull on wires or probe connector terminals.
- Reconnect an accessible loose connector securely, then check whether the warning returns after normal operation. A returning code still needs diagnosis rather than automatic sensor replacement.
- If the fault persists or the engine runs poorly, arrange vehicle-specific electrical and signal testing instead of replacing parts based only on the code.
When to Call a Professional
A technician can review stored codes and freeze-frame data, inspect the sensor connector and wiring, and test the circuit using the vehicle-specific service information. Comparing camshaft and crankshaft signals, and checking for related mechanical timing issues when indicated, can help distinguish a circuit fault from a sensor or engine-mechanical problem.
Compare component listings
Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.
Commonly Asked Questions
Does P0345 prove that the camshaft position sensor needs replacement?
No. It indicates a detected problem in the Bank 2 sensor A circuit. Wiring, connector, electrical supply or ground, the sensor, or a related signal or timing issue may need to be checked.
Can I keep driving with P0345?
If the vehicle runs normally, a short, cautious trip to arrange diagnosis may be reasonable. If it stalls, runs very roughly, or loses power, stop driving when safe and have it inspected.
What does Bank 2 mean?
Bank 2 identifies one side of the engine, but which side that is depends on the engine design. Use vehicle-specific service information rather than guessing from the sensor position.
What is a useful first check?
With the engine off and cool, look for an accessible loose or visibly damaged connector or wiring at the relevant sensor. If nothing obvious is found, electrical and signal tests are needed to identify the cause.
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.