P0345 on 2005-2015 Nissan Xterra 4.0L: Camshaft Sensor (Bank 2) Causes and Fixes

What's Unique About the 2005-2015 Nissan Xterra

Failure of the camshaft position sensors is an extremely common and well-documented issue on the VQ40DE engine used in the 2005-2015 Xterra, Frontier, and Pathfinder. The sensors are located at the back of the engine against the firewall, where high heat contributes to their premature electronic failure. Owner and mechanic experiences overwhelmingly show that using cheap, unbranded aftermarket sensors often leads to a repeat failure in a short time, sometimes within days. For this specific vehicle, using a genuine Nissan or OEM-supplier (Hitachi) part is critical for a successful repair. Some owners report that Nissan updated the original plastic-tipped sensors to a more durable metal-tipped version, which should be used if available.

Symptoms You May Notice

• Engine stalling, often when hot or slowing to a stop.
• Hard starting (long crank time) or complete failure to start, particularly after a hot soak.
• Check Engine Light is on.
• VDC and/or SLIP warning lights may illuminate.
• Noticeable loss of engine power and poor acceleration.
• Rough or uneven idle and engine misfires.
• Increased fuel consumption.

Most Likely Causes

1. Failed Bank 2 (Driver's Side) Camshaft Position Sensor 🔴 High Probability → Shop Engine Camshaft Position Sensor The sensors are located in a high-heat area at the rear of the engine, which causes the internal electronics to fail over time. This is a widely recognized weak point on this engine, with the original parts being particularly susceptible.
   How to confirm: Confirm the code is P0345. Due to the extremely high failure rate of this part and its relatively low cost, the most common diagnostic step is to replace the sensor with a known-good part. An auto parts store employee may misidentify Bank 2 as the passenger side; P0345 is definitively the driver's side.
   Typical fix: Replace the Bank 2 (driver's side) camshaft position sensor. It is highly recommended to also replace the Bank 1 (passenger's side) sensor at the same time, as it has been subjected to the same conditions and is likely to fail soon. Many owners also proactively replace the crankshaft position sensor at the same time.
   Est. part cost: $50-$120
2. Use of Low-Quality Aftermarket Sensor 🟡 Medium Probability The engine's computer is sensitive to the signal quality from these sensors. Many non-OEM/non-Hitachi sensors provide a signal that is out of spec, causing the code to return shortly after replacement. Some owners have had issues even with reputable aftermarket brands and found success only with genuine Nissan parts.
   How to confirm: Check the brand of the currently installed sensor. If it is not a Nissan or Hitachi part and the P0345 code is present, the sensor itself is the likely culprit. The problem can manifest immediately or within a few weeks or months.
   Typical fix: Replace the aftermarket sensor with a genuine Nissan or Hitachi-branded part. The light may clear on its own after about 100 miles of driving or can be cleared with a scanner.
   Est. part cost: $50-$120
3. Damaged Wiring or Loose Connector ⚪ Low Probability The wiring harness is in a tight, hot space. Over time, the plastic connector can become brittle and fail to lock securely, or wires can be damaged during other repairs. The locking tab on the connector is a common failure point.
   How to confirm: Visually inspect the sensor's electrical connector for cracks, corrosion, or a loose fit. Wiggle the connector with the engine running to see if it causes a stall or stumble. Check the wiring harness for any signs of chafing or heat damage, especially where it is bracketed near the sensor.
   Typical fix: Repair the damaged section of wire or replace the pigtail connector if the lock is broken. A zip tie can be used as a temporary measure to hold a broken connector in place.
   Est. part cost: $15-$40

Rare But Worth Checking

• Stretched Primary Timing Chain or Failed Chain Guides: → Shop Engine Timing Chain This is a known but much larger issue on higher-mileage VQ40DE engines. It would almost certainly be accompanied by other codes (like P0340, P0011, P0021) and a distinct whining noise from the front of the engine. If you only have P0345, this is very unlikely to be the cause.
• Improperly Seated Sensor: A Reddit user shared an experience where a P0345 code persisted after replacing both sensors with OEM parts. The cause was found to be the Bank 1 sensor not being seated and rotated correctly. The sensors are sensitive and must be perfectly aligned and fully seated for proper operation.
• Low Battery Voltage or Failing Alternator: → Shop Alternator While a weak electrical system can cause various sensor codes, it's not a primary cause for an isolated P0345. If you also have slow cranking and other electrical issues, test the battery and alternator before replacing sensors.

Diagnosis Steps

1. Confirm the presence of the P0345 code using an OBD-II scanner.
2. Note any other codes present. If P0340 is also present, plan to replace both sensors.
🎬 Watch: A complete walkthrough for replacing both camshaft sensors.
3. Visually inspect the Bank 2 (driver's side) camshaft position sensor, located at the back of the cylinder head against the firewall. It is held in by a single 10mm bolt. Check that the connector is securely plugged in and not cracked.
4. Inspect the wiring leading to the sensor for any visible damage, melting, or chafing. On the passenger side, a wiring harness bracket held by a 12mm bolt may need to be loosened to provide enough clearance to remove the sensor.
5. Given the high failure rate, the most practical next step is to replace the sensor with a new, high-quality part (Hitachi or Nissan). The Bank 2 sensor has an angled connector.
6. Before installing the new sensor, apply a light coat of clean engine oil or O-ring grease to the O-ring to aid installation and ensure a good seal.
7. Ensure the new sensor is fully seated and clicks into place. An improperly seated sensor can cause the code to persist. A small inspection mirror can be helpful to align the bolt hole.
8. After replacement, clear the codes with the scanner and perform a test drive to ensure the code does not return. Some sources suggest the code may clear on its own after a certain number of drive cycles or miles.

Parts You'll Likely Need

• Camshaft Position Sensor (Bank 2, Driver's Side, Angled) (OEM #23731-AL61A) — This is the component that fails most frequently, triggering the P0345 code. The Bank 2 sensor is identifiable by its angled connector body. This part number is superseded by 23731-AL61D. Other cross-referenced part numbers include 23731-7Y000, 23731-AL610, 23731-AL615, 23731-AL616, SU6480, and PC461.
  Trusted brands: Nissan (OEM), Hitachi (OEM supplier, Part #CPS0005)
  OEM price range: $90-$120
  Aftermarket price range: $40-$80
• Camshaft Position Sensor (Bank 1, Passenger's Side, Straight) (OEM #23731-6J90B) — It is highly recommended to replace both sensors at once, as the other is likely near the end of its service life. The Bank 1 sensor has a straight connector body. 🎬 Watch this guide to fix the Bank 1 P0340 code.
  Trusted brands: Nissan (OEM), Hitachi (OEM supplier, Part #CPS0008)
  OEM price range: $90-$120
  Aftermarket price range: $40-$80

Related Codes That Often Appear With This One

• P0340 — P0340 is the equivalent code for the Bank 1 (passenger side) camshaft sensor. Since both sensors live in the same harsh environment and have the same lifespan, it's very common for them to fail around the same time, triggering both codes.
• P0300 — A P0300 (Random/Multiple Cylinder Misfire) can be triggered because the faulty camshaft sensor signal causes incorrect ignition and fuel timing, leading to misfires across multiple cylinders.

Platform-Specific Known Issues

• The sensors are notoriously difficult to access, especially the Bank 1 (passenger's side) sensor, as they are located on the back of the cylinder heads against the firewall. Many owners find it necessary to climb on top of the engine for better access.
• It is strongly advised by experienced owners and mechanics to only use genuine Nissan or Hitachi brand sensors. Cheaper aftermarket parts are known to fail quickly or be dead-on-arrival.
• To gain clearance for the passenger side (Bank 1) sensor, it may be necessary to unbolt a 12mm wiring harness bracket to move the harness out of the way.
• A small 10mm wrench is often the best tool for the sensor bolt due to the tight clearance.

Mechanic-Grade Diagnostic Values

• Camshaft Position Sensor Power Supply Voltage — expected: Approximately 5V DC with key on, engine off.. Failure: Voltage below 5V or no voltage indicates a wiring or ECM power supply issue, not necessarily a bad sensor.
• Camshaft Position Sensor Signal Wire Voltage (Static) — expected: Approximately 4V to 5V DC with key on, engine off, sensor connected.. Failure: No voltage or significantly lower voltage can indicate a short in the wiring or a failed sensor.
• Camshaft Position Sensor Signal Wire Voltage (Dynamic) — expected: Using a multimeter, voltage should drop to near 0V momentarily when a piece of metal is passed in front of the sensor tip. With an oscilloscope, a clean, repeating digital square wave pattern fluctuating between ~0.5V and ~4.5V should be observed while the engine is running.. Failure: A flat line, a distorted wave, or missing pulses on an oscilloscope indicates a failed sensor or a problem with the reluctor wheel.
• Camshaft Position Sensor Ground Wire — expected: With the multimeter set to Volts DC, probing the ground pin on the connector and the positive battery terminal should show battery voltage (approx. 12V).. Failure: No or low voltage indicates a bad ground connection for the sensor circuit.

Scan Tool Commands That Help

• Nissan CONSULT-II / CONSULT-III or equivalent professional scanner: Data Monitor for Engine — Use this to observe the live data stream from the camshaft position sensors (both Bank 1 and Bank 2) and the crankshaft position sensor. A healthy sensor will show a consistent RPM reading that changes with engine speed. A faulty sensor may show 0 RPM, an erratic reading, or a reading that doesn't match the other sensors.
• cvtz50 App + OBD2 Adapter: Idle/Timing Adjust — While not a direct diagnostic for P0345, some users have used this application to adjust base timing. If timing has been altered, it could potentially cause issues, though it's more likely to be a mechanical timing issue (stretched chain) rather than an electronic one that needs this tool. This is more relevant for idle speed issues after a throttle body service.

Wiring & Ground Locations

• Bank 2 Camshaft Sensor Connector — Located on the rear of the driver's side cylinder head, against the firewall. The connector is angled.. This is the primary connection point for the sensor. The connector itself can become brittle from heat, and the locking tab can break, leading to a poor connection that mimics a sensor failure.
• Main Engine Grounds — A main engine ground often runs from the intake manifold to the battery negative terminal, and another from the exhaust side of the cylinder head to the firewall.. While not a direct cause, a poor main engine ground can introduce electrical noise and voltage issues across all sensors, potentially leading to erroneous sensor codes like P0345.

Real Owner Repair Stories

• Reddit user in r/Xterra (2005 Nissan Xterra) — Engine stalled, OBD scanner showed P0345 for the driver's side camshaft sensor.
  ❌ Tried (didn't work) Replaced both camshaft sensors with parts from Autozone. The P0345 code returned two weeks later.
  ✅ What actually fixed it The user had to replace the aftermarket sensor again, this time with a genuine OEM part from a Nissan dealer. They noted the check engine light went away on its own after about 100 miles of driving.
• NHTSA ODI #11420324 — An owner reported replacing camshaft position sensors five times using both Auto Zone and Hitachi parts, yet the engine continued to cut out while turning with codes P0340 and P0345 appearing randomly.

OEM Part Supersession History

• 23731-AL61A → 23731-AL61D — Standard part revision and update by the manufacturer.
  Heads up: The new part number is a direct replacement. Some owners and vendors note that Nissan uses two functionally identical versions of this sensor: one with a plastic tip and an updated one with a metal tip. Either may be received when ordering the OEM part.

Model Year Variations Within This Range

• 2009-2015: The Xterra received a facelift for the 2009 model year which included a revised front end, new bumper, and interior updates like new HVAC controls. However, the VQ40DE engine and the associated camshaft position sensors remained the same, so the causes and fixes for P0345 are identical across the entire 2005-2015 generation.

Diagnostic Flowchart

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, using a used camshaft position sensor from a junkyard is NOT recommended. The part is a known high-failure item due to heat degradation, and a used part has an unknown history and is likely to fail soon, if it works at all. The labor to access the sensor is significant enough that you do not want to repeat the job.

What to inspect on the donor part:

• Not applicable as used part is not recommended.

OEM-only on this vehicle (don't cheap out):

• Camshaft Position Sensor

Aftermarket brands forum-validated for this vehicle:

• Hitachi (OEM supplier)

Brands owners have reported issues with on this vehicle:

• Unbranded or store-brand (e.g., Duralast from Autozone) sensors are frequently reported by owners to be dead-on-arrival or fail within a very short period, causing the code to return.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Documented NHTSA Reports

Related OBD-II Codes

• P0340 — Companion code for the Bank 1 (passenger's side) camshaft position sensor. Due to the identical high-heat location, if one sensor fails (P0345), the other (P0340) is likely to fail soon. They are often replaced in pairs.
• P0335 — Code for the crankshaft position sensor. This sensor works in conjunction with the camshaft sensors for engine timing. A failure can cause similar stalling and no-start symptoms, and many owners replace it proactively with the cam sensors.
• P0300 — Random/Multiple Cylinder Misfire. A faulty camshaft position sensor provides incorrect data to the ECU, which can disrupt ignition timing and lead to misfires across multiple cylinders.
• P0302 — Cylinder 2 Misfire Detected. As P0345 relates to Bank 2 (driver's side), misfires may be isolated to the cylinders on that bank (2, 4, and 6). This is a potential secondary code.
• P0304 — Cylinder 4 Misfire Detected. As P0345 relates to Bank 2 (driver's side), misfires may be isolated to the cylinders on that bank (2, 4, and 6). This is a potential secondary code.
• P0306 — Cylinder 6 Misfire Detected. As P0345 relates to Bank 2 (driver's side), misfires may be isolated to the cylinders on that bank (2, 4, and 6). This is a potential secondary code.

Frequently Asked Questions