P0365: How to Diagnose & Fix — Camshaft Position Sensor "B" Circuit (Bank 1)
2 vehicles · 2 makes · $120-$450 repair
How to diagnose and fix P0365: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Kia Forte · 2010–2018
The CKP sensor on the Forte becomes heat-sensitive as it ages: the signal drops out once the engine bay is hot, so the engine stalls when coming to a stop or at idle, then refuses to restart until it cools for 10-20 minutes. Owners describe the car cranking normally with no spark/injection event and eventually setting P0335 (Crankshaft Position Sensor A Circuit). It is often misdiagnosed as a fuel pump or battery issue because the symptom is intermittent and disappears when the car is cold. Reported across the TD, Koup 2.4 Theta II, and YD/Forte5 cars.
Common Symptoms
- Engine stalls when slowing to a stop, especially when warmed up
- Cranks but will not start until it cools down
- Long crank time
- Tachometer drops erratically or reads zero while cranking
- Check engine light
How to Fix
Confirm before replacing: watch RPM in live data while the engine stalls or during a hot no-start crank - RPM dropping to zero while cranking points at the CKP. Check the sensor connector and harness for oil contamination and chafing, and verify the tone-ring/flexplate teeth are not damaged. Replace with a genuine Kia sensor rather than a cheap aftermarket unit, as owners report repeat failures with off-brand parts. The sensor is inexpensive; most of the cost is access labor. If P0365/camshaft codes appear alongside it, inspect the CVVT circuit and harness rather than blindly replacing both sensors.
Sources for this issue (3)
Infiniti M37 · 2011–2013
The VQ37VHR engine can develop intermittent camshaft or crankshaft position sensor failures, causing hard starts, stalling, or reduced performance. Heat and age can degrade the sensors or their signal quality, and owners across Nissan/Infiniti VQ applications frequently report these failures as mileage increases.
Common Symptoms
- Check engine light
- Extended cranking or hard starting
- Engine stalling intermittently
- Reduced power or limp-like behavior
How to Fix
Diagnosis is done with a scan tool and live data to identify which sensor is dropping out, followed by checking connector condition and harness integrity. Repair involves replacing the failed camshaft or crankshaft position sensor with a quality OE-equivalent part and clearing codes; typical repair costs range from about $180-$450 depending on which sensor failed and labor access.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Walker Products 235-1386 crankshaft position sensorOEMWalker Products 235-1386
Confirm eBay vehicle compatibility and exact part number before purchase; it is not a cam sensor.
- OEM Infiniti M37 crankshaft position sensorOEM23731-JA10C
OE crank-sensor branch after P0335/signal diagnosis Fitment/availability: Fits 2011-2013 M37 VQ37VHR and mounts at the engine/transmission junction. Confirm VIN and that the crank signal—not a cam circuit, wiring or timing fault—is the f…
- Genuine Infiniti VQ37VHR camshaft position sensorOEM23731-EY00B
Cam-sensor branch after bank/sensor diagnosis Fitment/availability: Fits listed 2011-2013 M37 VQ37VHR; quantity two are used and sold individually.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipIf one sensor fails at higher mileage, inspect the others and the connectors at the same time since heat exposure affects them similarly.
- TipAvoid cheap no-name sensors; many owners report repeat check-engine lights and drivability issues with low-cost replacements.
Sources for this issue (2)
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P0365 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0365 mean?
P0365 stands for "Camshaft Position Sensor "B" Circuit (Bank 1)." This code means the engine computer detected a problem in the circuit for the 'B' camshaft position sensor on Bank 1 (typically the exhaust camshaft, or the second cam sensor on that bank). This sensor reports camshaft position so the PCM can correctly time fuel injection, ignition, and variable valve timing. A circuit fault here can cause hard starting, rough running, reduced power, or affect variable valve timing. While usually not an immediate breakdown risk, it should be addressed to avoid driveability and timing-related issues.
What are the most common causes of P0365?
The most common causes of P0365 are: Faulty camshaft position sensor (Bank 1, sensor B), Damaged wiring or connector at the sensor, Open or short in the sensor circuit, Corroded or loose connector pins, Reluctor/tone ring damage on the camshaft, Failing PCM (less common). The specific cause varies by vehicle.
How much does it cost to fix P0365?
Repair costs for P0365 range from $120 to $450, depending on the vehicle and root cause.
Which vehicles are affected by P0365?
Au7o has documented P0365 across 2 vehicle models from 2 manufacturers: Infiniti, Kia.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.