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Camshaft Position Sensor for Nissan Atleon, Cabstar, Civilian & Safari – 23731LC30A | 2026 Technical Review & DTC Guide
The 23731LC30A in 2026: What It Fits and What Changed
The Camshaft Position Sensor 23731LC30A is a direct-fit replacement for the Nissan Atleon, Cabstar, Civilian, and Safari light-to-medium commercial platforms, covering the BD30, TD42, ZD30, and QD32 engine families.
The 2026 revision replaces the legacy Hall-effect plate with a tri-axis magnetoresistive (xMR) sensing element. That is the architecture shift behind 2026 Euro VII / BS-VII diagnostic readiness — and the reason camshaft diagnostics on these engines now work differently.
Signaling runs on compliant CAN-bus 3.0 — CAN FD at up to 5 Mbps — under SAE J1939-76:2026 (Commercial Vehicle CAN FD Physical Layer) and ISO 27145:2026 (WWH-OBD Global Harmonization). On MY2026+ recalibrated fleets, the ECU gets zero-latency camshaft position data for variable valve timing and diesel common-rail injection phasing.
Cross-Brand Coverage
OEM cross-compatibility extends to Nissan UD Trucks, Renault Trucks Mascott, and select Isuzu NPR derivatives sharing the 23731 platform code. For the wider catalog across makes and models, start from the Engines & Engine Parts collection.
Bottom line: the 2026 unit is not a drop-in copy of the 2023 sensor — housing, accuracy, protocol, sealing, and DTC coverage all changed. Match the revision to your model year before you order.
Specification Comparison: 2023 MY vs. 2026 MY
| Parameter | 2023 MY Sensor | 2026 MY (Koeep 23731LC30A) |
|---|---|---|
| Sensing technology | Single-axis Hall-effect | Tri-axis AMR (xMR) |
| Housing material | PA66-GF35 (155°C max) | PEEK composite (180°C max) |
| Angular accuracy | ±0.5° crank-angle | ±0.15° crank-angle |
| CAN protocol | CAN 2.0B (1 Mbps) | CAN FD 3.0 (2–5 Mbps) |
| Operating temperature | −30°C to +130°C | −40°C to +160°C |
| DTC coverage | P0340–P0349 | P0340–P0349 + P034A–P034F (WWH-OBD) |
| Connector | 3-pin JST (unsealed) | 3-pin IP67 sealed (Sumitomo TS) |
| OEM part number | 23731LC30A / 23731-VC10A | 23731LC30A (2026 revision) |
| Projected service life | 2023–2027 | 2026–2030+ |
Housing and Sensing Architecture
The 2026 housing is a polyetheretherketone (PEEK) composite rated for continuous operation at 180°C — a 25°C uplift over the 2023 sensor's PA66-GF35 nylon. The headroom is not cosmetic: Euro VII-compliant BD30Ti and ZD30DDTi engines run high-pressure EGR and dual-stage turbocharging, pushing thermal loads past what the old nylon tolerated.
Tri-axis AMR vs. Single-axis Hall-effect
Legacy single-axis Hall-effect plates suffer magnetic hysteresis drift above 6,000 RPM. The 2026-spec sensor swaps in a tri-axis anisotropic magnetoresistive (AMR) bridge with angular accuracy of ±0.15° crank-angle equivalent — a 3× improvement over Hall.
Two gains matter in daily service. The AMR bridge is immune to ferromagnetic debris buildup on the target wheel, and it holds output steady across the full −40°C to +160°C envelope without external temperature compensation. That last point is critical on the TD42T, where the camshaft target wheel sits adjacent to the exhaust manifold.
DTC Coverage in the 2026 Matrix
The sensor is validated against the complete SAE J2012 / ISO 15031-6 DTC matrix for camshaft position faults. The 2026 firmware-compatible variant adds the new P034A–P034F sub-range — Camshaft Position Sensor 'A' Signal Message Counter Incorrect — under WWH-OBD extended reporting:
- P0340–P0349: Camshaft Position Sensor 'A' circuit, range/performance, intermittent, and signal faults (SAE J2012 core).
- P034A–P034F: Signal message counter, checksum, and rolling counter faults (ISO 27145:2026 WWH-OBD extended).
- P0016–P0019: Crankshaft-camshaft correlation, Bank 1 & 2 — timing misalignment detection enabled by the high-resolution AMR element.
- P0390–P0394: Camshaft Position Sensor 'B' circuit faults on twin-cam TD42T applications.
- U0100–U01FF: CAN FD communication loss — the sensor's integrated SBC (System Basis Chip) reports bus-off events independently.
Fitment, Compatibility, and Cross-References
The Koeep 23731LC30A is backward-compatible with 2010–2025 Cabstar, Atleon, Civilian, and Safari models on BD30, ZD30, TD42, or QD32 engines. The output protocol auto-negotiates: on MY2010–2022 vehicles using CAN 2.0B it runs in legacy 1 Mbps mode with no setup.
On MY2023–2025 vehicles, verify your ECU firmware revision first — sensors shipped after January 2026 default to CAN FD and may need a Consult VI+ protocol reconfiguration. Pre-2010 vehicles with analog (0–5V) interfaces are not compatible; for the analog variant, write to support@koeep.com or message the team on WhatsApp.
- Nissan OEM: 23731-VC10A, 23731-VC10B, 23731LC30B
- Renault Trucks: 5010327019
- UD Trucks: 23731LC30A-UD
- Koeep SKU: 23731LC30A-MY2026, projected active service life 2026–2030 with backward compatibility to MY2010
Certification footprint: the PEEK housing is certified to SAE J1639:2026 Class 3 (continuous 180°C under-hood polymers), the connector assembly to USCAR-2 Rev. 8 (2026) for terminal retention with IP67 ingress protection per ISO 20653:2026, and the AMR die is AEC-Q100 Grade 0 qualified at −40°C to +160°C ambient.
Every unit ships with a batch-specific PPAP Level 4 documentation package — material certs, dimensional layout, and end-of-line test data. Fleet buyers get the FleetShield™ Extended Coverage Program: 36-month / 100,000 km warranty and guaranteed availability through 2030. For bulk pricing or the datasheet, use the request-for-quote page or the full product specification page.
Different Platform? Match the Part Number
This unit is for the Nissan commercial diesels above. For a 2002–2006 Nissan Altima 2.5L, use the 2X 23731-6N21A camshaft/crankshaft position sensor set instead. For the INFINITI Q50 (2014–2021) and Nissan Murano, the 4-pack of 23731JA11A camshaft position sensors is the correct match.
Planning cabin work alongside engine repairs? The 2008–2015 Nissan Rogue front driver-side window regulator guide on the Koeep blog walks that job step by step.
2026 Diagnostic FAQ
P0340 appears after a cold start — is the sensor faulty?
On 2026+ platforms, P0340 is no longer a simple circuit fault. Disconnect the battery first, then measure CAN FD bus termination at the sensor connector: 60 Ω ±5 Ω. If that checks out, scope CAN_H/CAN_L for a dominant-to-recessive transition within 1.5 µs. Missing it points to a degraded internal transceiver — fit a new Koeep 23731LC30A and run the CAN FD Node Configuration reset via Consult VI+ (2026 firmware).
P0016 persists after a timing chain replacement — why?
P0016 on the ZD30DDTi and BD30Ti gets misdiagnosed a lot. The 2026 xMR sensor tightens the ECU correlation window to ±2° crank-angle (was ±5°). Check the target wheel for axial runout over 0.15 mm TIR, make sure the mounting boss is free of corrosion that offsets the air gap, then run the CMP/CKP Correlation Relearn in Consult VI+. If the code stays, thermal cycling may have phase-drifted the AMR element — replace the sensor.
Will it work on my 2015 Nissan Cabstar?
Yes, with one qualification. The unit is backward-compatible with 2010–2025 Cabstar, Atleon, Civilian, and Safari models on BD30, ZD30, TD42, or QD32 engines. A 2015 truck falls in the MY2010–2022 band, so the sensor auto-negotiates down to legacy CAN 2.0B at 1 Mbps — no reconfiguration needed. The ECU firmware check only applies to MY2023–2025 vehicles.
Intermittent rough idle plus P0341 on a 2026 Civilian — root cause?
Most often EMI on the CAN FD bus. The relocated DPF regeneration burner sits closer to the firewall and can induce high-frequency noise on unshielded wiring. Check the twisted pair to the ECU — the shield drain wire must terminate at both ends under 5 mΩ to chassis ground. If EMI is the culprit, fit a ferrite common-mode choke (TDK ZCAT or equivalent) within 150 mm of the connector. Dropouts that persist point to an AMR micro-fracture from vibration — replace the sensor.
Do I need an ECU reflash when retrofitting a MY2023–2025 vehicle?
Treat the reflash as part of the job. The 2026 sensor defaults to CAN FD at 2–5 Mbps, and a MY2023–2025 ECU may still expect CAN 2.0B unless its firmware is current. Verify the ECU firmware revision first, then reconfigure the protocol with Consult VI+ if required. MY2010–2022 vehicles negotiate down automatically; pre-2010 trucks with analog (0–5V) interfaces need the separate analog variant from Koeep support.
What paperwork and warranty come with fleet orders?
Every unit ships with a batch-specific PPAP Level 4 package: material certs, dimensional layout, and end-of-line test data. Commercial fleet applications fall under the FleetShield™ Extended Coverage Program — 36-month / 100,000 km warranty, availability through 2030. For bulk pricing or the technical datasheet, start at the request-for-quote page.
Order the 2026-Revision Sensor
The Koeep 23731LC30A Camshaft Position Sensor ships with the PPAP Level 4 package and covers the Atleon, Cabstar, Civilian, and Safari platforms with backward compatibility to MY2010.
Bulk fleet orders: request a quote · support@koeep.com · WhatsApp
- Koeep product page: Camshaft Position Sensor 23731LC30A (Nissan Atleon, Cabstar, Civilian, Safari)
- Source review: Camshaft Position Sensor for Nissan Atleon, Cabstar, Civilian & Safari — 23731LC30A, 2026 Technical Review & DTC Guide (koeep.com)
- 2X 23731-6N21A Camshaft Crankshaft Position Sensor, 02–06 Nissan Altima 2.5L
- 4 X Camshaft Position Sensor 23731JA11A, INFINITI 2014–2021 Q50 and Nissan Murano
- Koeep Engines & Engine Parts collection
- Complete Guide to 2008-2015 Nissan Rogue Front Driver Left Window Regulator Replacement
- Koeep request-for-quote page