The P0345 code on a Nissan points to a fault in the Camshaft Position Sensor A circuit, most often requiring a replacement sensor, wiring repairs, or timing verification. In many cases, correcting the sensor wiring or replacing a faulty sensor resolves the issue, but timing problems can also trigger the code and may require mechanical adjustment.
This article explains what P0345 means for Nissan models, outlines the common causes, provides a structured approach to diagnosis, and offers practical repair options. While the steps apply to many Nissan engines that use a Camshaft Position Sensor A circuit, exact locations, part numbers, and torque specs vary by model and engine code. Always consult your service manual for model-specific guidance.
What P0345 means for Nissan
P0345 is the diagnostic trouble code for Camshaft Position Sensor A Circuit Malfunction. In Nissan vehicles, this typically refers to the sensor that monitors the camshaft position (often Bank 1 Sensor 1 or Cam Sensor A). When the engine control module cannot receive a proper signal from this sensor, it can trigger misfires, rough idling, hesitation, or stalling, and the check engine light will come on. Because the timing of the camshaft interacts with the crankshaft position signal, other issues like timing belt/chain wear or jump can mimic or exacerbate the fault.
Common causes
These are the most frequent culprits behind a P0345 code on Nissan engines. If you’re diagnosing, start with the simplest and most accessible items first.
- Faulty camshaft position sensor (A) or a damaged/aged sensor harness connector
- Timing issues such as a stretched/broken timing belt or a shifted timing chain causing cam timing to be out of sync
- Oil leakage or contaminated oil affecting cam/valve timing components (especially with VVT systems)
- Faulty crankshaft position sensor or mixed signals causing loss of synchronization
- ECU/software issues or recent reprogramming that affects sensor interpretation
Concluding: Most fixes target the sensor or its wiring, but timing-related problems, while less common, can produce the same code and require mechanical correction.
Diagnostic steps
Follow a systematic approach to identify whether the problem is electrical, timing-related, or a combination. Gather your tools and work safely, ideally with the engine off and the battery disconnected when disconnecting electrical connectors.
- Scan for codes and review live data from the cam and crank sensors to check for valid signals and proper sequencing.
- Inspect the camshaft position sensor wiring and connector for corrosion, frayed wires, or loose terminals. Look for oil contamination or heat damage near the sensor.
- Test the 5-volt reference and ground circuit to the cam sensor using a multimeter, ensuring the sensor is receiving power and has a solid ground.
- Measure the resistance of the camshaft position sensor as specified in the service manual and compare it to the nominal range for your engine.
- Inspect timing components (belt/chain, tensioners, guides) for wear, misalignment, or evidence of jumped timing. Re-timing should be performed only if you observe timing marks out of spec.
- Check for related issues in the variable valve timing (VVT) system or oil supply to solenoids if your engine uses VVT and note any abnormal oil pressure or sludge.
Concluding: The diagnostic process helps distinguish between an electrical fault, a sensor issue, or a mechanical timing problem. If the code changes or clears after testing, you have identified the root cause; if not, proceed to corrective repairs.
Repairs and replacements
Camshaft position sensor replacement
When the sensor proves faulty, replacement is often the most straightforward fix. Steps generally include: disconnecting the battery, unplugging the sensor harness, removing the mounting bolt, replacing the sensor with the correct Nissan part, reattaching the connector, and torquing to spec. After installation, clear codes and perform a road test to confirm the issue is resolved and that no new codes appear. Some vehicles may require a brief idle relearn or drive cycle to normalize sensor readings; consult your manual for model-specific instructions.
Wiring and harness repair
If inspection reveals damaged or corroded wiring or a compromised connector, repair or replace the affected section. This can involve cleaning or re-crimping terminals, replacing a damaged harness segment, or applying weatherproof connectors. After repairs, retest the circuit, clear codes, and perform a drive cycle to ensure the code does not return.
Timing and mechanical fixes
If timing is out of spec, you must restore proper synchronization. This typically requires re-timing the engine with new timing belt/chain components as necessary, inspecting tensioners and guides, and ensuring correct alignment marks. After re-timing, recheck the cam/crank signals with diagnostic equipment, clear codes, and run a test drive. Note that improper timing can cause severe engine damage; avoid extended operation until timing is verified.
Software updates and TSBs
In some Nissan models, an ECU software update or a manufacturer technical service bulletin (TSB) addresses false positives or improves sensor interpretation. Check with a Nissan dealer or service portal for model-specific TSBs and software availability. If a software fix is available, it may be performed in conjunction with sensor or timing repairs.
When to seek professional help
If you are not confident performing electrical tests, sensor replacements, or timing work, or if the code persists after repairs, consult a qualified mechanic. Timing issues in particular can cause catastrophic engine damage if not handled correctly, so professional diagnosis is advised if there is any doubt.
Maintenance and prevention tips
Routine maintenance can reduce the likelihood of cam sensor and timing issues. Use the recommended oil grade and change intervals, keep timely oil changes for oil pressure-sensitive systems (like VVT), inspect electrical connectors for corrosion, and ensure the intake and vacuum paths are clean. If you notice rough running, misfires, or stalling, address the symptoms early to prevent further damage.
Summary
The P0345 code on a Nissan usually points to an issue with the Camshaft Position Sensor A circuit—commonly the sensor itself, its wiring, or a timing-related problem. Start with a thorough electrical inspection of the sensor and harness, then verify timing if electrical checks pass. Replacing the sensor or repairing wiring often resolves the code; if timing is suspected, professional timing reassembly may be required. Always consult the specific Nissan service manual for your engine code and consider dealer TSBs or software updates when available. A careful diagnosis followed by targeted repair will restore reliable operation and avoid unnecessary replacements.
Where is the camshaft position sensor B Bank 2 located?
It's on the back side of the driver side of the engine. On top of the cylinder head. Underneath all the hoses.
What is the code P0345 cam position sensor circuit bank 2?
Diagnostic trouble code (DTC) P0345 stands for “Camshaft Position Sensor “A” Circuit (Bank 2).” The powertrain control module (PCM) sets the P0345 code if the camshaft position sensor (CMP) either sends inconsistent signals or stops transmitting any signal.
Can a P0345 be fixed temporarily?
Attempting a patch repair may restore operation temporarily, but the defect frequently reappears, leading to repeated check‑engine lights and potential downstream damage.
How do I fix code P0345 on a Nissan?
Replace corroded wires and tighten any that are loose. In the event that the problem persists, inspect the camshaft for any broken teeth. If you find damage, the part will need to be replaced.