P0344 on 2014-2018 Ram 2500: Intermittent Cam Sensor Causes and Fixes

What's Unique About the 2014-2018 Ram 2500

On this generation of Ram HD trucks, P0344 is a notoriously tricky code. Manufacturer Technical Service Bulletins (TSBs) were issued that, in an unusual step, instructed dealership technicians to contact specific company engineers by cell phone before replacing the camshaft position sensor. This strongly suggests that the sensor itself is often not the root cause and that technicians were frequently misdiagnosing the issue. The most common underlying problem is damage to the wiring harness, which can rub through its insulation, mimicking the symptoms of a failed sensor.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Engine stalling, especially at idle or low speeds
• Hesitation or stumbling during acceleration
• Rough or erratic idle
• Difficulty starting the engine, or a no-start condition
• Check Engine Light (MIL) is illuminated
• Traction Control light may illuminate intermittently.

Most Likely Causes

1. Damaged Camshaft Position Sensor Wiring or Connector 🔴 High Probability → Shop Engine Camshaft Position Sensor The engine bay environment's heat and vibration can cause the wiring harness to chafe against engine components or brackets. This is a well-documented issue on this platform, corroborated by TSBs and owner forums. A frequently reported chafe point is where the main engine harness runs underneath the airbox assembly. 🎬 See how a damaged wiring harness causes stalling issues
   How to confirm: Visually inspect the entire length of the wiring harness from the sensor back to the main loom. Remove the airbox to inspect the harness underneath it for rubbed-through insulation. Pay close attention to areas where it bends or is close to metal brackets. Look for exposed wires, or corrosion in the connector.
   Typical fix: Repair the damaged section of wire using solder and heat-shrink tubing. If the connector is damaged, replace the pigtail. Secure the harness away from any sharp edges or contact points to prevent future damage.
   Est. part cost: $10-$50
2. Faulty Camshaft Position Sensor (CMP) 🟡 Medium Probability → Shop Engine Camshaft Position Sensor While the sensor can fail, it's often replaced unnecessarily. Owners and technicians report a very high failure rate for aftermarket sensors on these trucks, making OEM parts essential if replacement is needed. Multiple forum threads describe owners replacing the sensor with an aftermarket part only for the code to return immediately or within a day.
   How to confirm: After confirming the wiring is intact, the sensor is the next likely cause. It can be tested with an oscilloscope to observe the signal pattern while cranking the engine 🎬 Watch: How to locate and test your camshaft sensor, but replacement is a common diagnostic step due to the part's relatively low cost. If an aftermarket sensor was recently installed, it is the primary suspect.
   Typical fix: Replace the camshaft position sensor. It is strongly recommended to use an OEM part from Mopar (for HEMI) or Cummins to ensure reliability.
   Est. part cost: $40-$140
3. Low or Dirty Engine Oil (HEMI V8 Engines) 🟡 Medium Probability The 6.4L HEMI engine uses a Variable Valve Timing (VVT) system that relies on oil pressure. If the oil level is critically low or the oil is very dirty, the VVT system can malfunction, which in turn can trigger a P0344 code. This issue is often more pronounced during cold starts or in very cold weather. This may also be accompanied by code P1524 'Oil Pressure Out of Range'.
   How to confirm: Check the engine oil level and condition using the dipstick. One owner reported finding their truck was 5 quarts low on oil, which was the root cause of their P0344 code. If the level is low, top it off. If the oil is old or dirty, perform an oil and filter change.
   Typical fix: Top off or change the engine oil and filter. Clear the code and test drive to see if it returns. One technician found that simply performing an oil change resolved the code after a sensor replacement did not.
   Est. part cost: $50-$100

Rare But Worth Checking

• Failing Crankshaft Position Sensor (CKP): A failing crankshaft sensor can create electrical noise or a conflicting signal that causes the PCM to incorrectly flag the camshaft sensor's signal. Some technicians have found that replacing the crank sensor resolves the P0344 code.
• Faulty VVT Solenoid / Oil Control Valve (HEMI V8): On HEMI engines, the VVT solenoid (also called an oil control valve) controls oil flow to the cam phasers. If this solenoid gets stuck or fails, it can cause timing issues that trigger a P0344 code, even with a good cam sensor and correct oil level. One owner on RamForum.com suspected this was their issue after replacing the sensor and connector did not fix the problem.
• Mechanical Timing Issue: In rare cases, a stretched timing chain, failed tensioner, or a problem with a VVT phaser can cause the camshaft's actual position to be out of sync, triggering the code. This is a more serious mechanical issue often accompanied by rattling noises.
• Failing Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) While uncommon, the PCM itself can fail and be unable to correctly process the signal from the sensor. This should only be considered after all other possibilities have been exhausted.

Diagnosis Steps

1. Read the code with an OBD-II scanner and check for any other stored codes, particularly P0340, P0016, or P1524.
2. FOR HEMI ENGINES: Immediately check the engine oil level and condition. This is a free check and a very common cause. Top off or change the oil if necessary, clear the code, and see if the issue returns.
3. Thoroughly inspect the camshaft position sensor's wiring harness. Remove the airbox and check the harness that runs underneath for any signs of chafing, melting, or corrosion. Follow the harness as far as possible.
4. Inspect the electrical connector at the sensor for loose pins, corrosion, or oil contamination. Clean with electrical contact cleaner and apply dielectric grease.
5. If an aftermarket sensor is installed, replace it with an OEM part before proceeding. Aftermarket sensor failure is extremely common for this code.
6. If wiring, oil level, and sensor brand are confirmed good, the next step is typically to replace the camshaft position sensor with a new OEM part.
7. If the code persists, more advanced diagnostics are needed. This includes using an oscilloscope to check the cam and crank sensor waveforms for abnormalities.
8. If waveforms are erratic, consider a potential issue with the crankshaft sensor, VVT solenoid (on HEMI), or mechanical timing components.

Parts You'll Likely Need

• Camshaft Position Sensor (OEM #Mopar 5149054AC (6.4L HEMI), Mopar 68526830AB (6.7L Cummins)) — This sensor is a common failure point after wiring issues have been ruled out. Using an OEM part is critical for reliability on these trucks. The listed part numbers are the most current revisions.
  Trusted brands: Mopar, Cummins
  OEM price range: $50-$140
  Aftermarket price range: $25-$80
• Camshaft Position Sensor Connector Pigtail — If the connector itself is damaged or corroded, or if wiring is damaged near the connector, replacing the pigtail is necessary to ensure a solid connection.
  Trusted brands: Mopar, Dorman
  OEM price range: $25-$50
  Aftermarket price range: $15-$30

Related Codes That Often Appear With This One

• P0340 — P0340 indicates a complete circuit malfunction, while P0344 is for an intermittent signal. They often appear together as a sensor or wiring issue worsens.
• P0016 — This code indicates a 'Crankshaft/Camshaft Timing Misalignment'. If you see this with P0344, it points towards a more serious mechanical timing problem, like a stretched timing chain, rather than just a sensor or wiring fault.
• P1524 — On HEMI engines, this code for 'Oil Pressure Out of Range' often appears with P0344. It strongly suggests the root cause is related to low oil level or a failing oil pressure-dependent system like VVT.

Technical Service Bulletins (TSBs) & Recalls

• TSB #68080819A: Advises technicians to contact a specific engineer before replacing a camshaft position sensor for a P0344 fault on 2014 models, indicating a known issue with misdiagnosis.
• TSB #05149141A: Similar to the above, advises contacting a specific engineer for a range of camshaft sensor codes including P0344, highlighting a complex issue that is often not the sensor itself.

Platform-Specific Known Issues

• Wiring Harness Chafing Under Airbox: A well-documented issue where the main engine wiring harness, which contains the camshaft position sensor wires, rubs against the bottom of the airbox assembly. Over time, this chafing wears through the insulation and causes an intermittent short or open circuit that triggers P0344, often in wet weather. A user on RamForum.com posted pictures of this exact failure on their 2016 2500 6.4L.
• High Failure Rate of Aftermarket Sensors: Aftermarket camshaft position sensors have a notoriously high failure rate on this platform. Numerous owners report on forums like RamForum.com that installing a non-OEM sensor either fails to fix the code or causes it to return within hours or days. It is strongly recommended to use an OEM part from Mopar or Cummins to avoid this common pitfall.

Mechanic-Grade Diagnostic Values

• Camshaft Position Sensor Connector Voltage Test (3-Wire Sensor) — expected: With the key on, engine off, and connector unplugged: Pin 1 (Supply) to Ground should be 5 volts. Pin 3 (Ground) to Battery Positive should show battery voltage (confirming ground path). Pin 2 is the signal wire. With the connector plugged in and back-probed, the signal wire should show a square wave switching between 0V and 5V on an oscilloscope as the engine runs.. Failure: No 5V supply, a bad ground reading, or a signal that is flat, noisy, or has dropouts indicates a problem in the wiring, PCM, or sensor.

Scan Tool Commands That Help

• High-End OBD-II Scanner / wiTECH: Camshaft Position Sensor Relearn Procedure — After replacing the camshaft position sensor, if the engine runs poorly or the code returns, a relearn procedure may be required for the PCM to recognize the new sensor's signal characteristics. Some scan tools have this as a specific function, while for other vehicles it may involve a specific drive cycle.

Wiring & Ground Locations

• Camshaft Position Sensor Connector (Typical 3-Wire) — On the 6.7L Cummins, the sensor is on the driver's side of the engine, above the ECU and below the CP3 injection pump. On the 6.4L HEMI, it is located on the front of the engine block below the intake manifold.. This connector is the primary point for testing the sensor's power, ground, and signal. The pins are typically: Pin 1 - 5V Supply from PCM, Pin 2 - Signal to PCM, Pin 3 - Sensor Ground. Verifying integrity here is a critical diagnostic step.
• Main Engine/Chassis Grounds — Key grounding points are located on the body near the battery, on the engine block, and on the passenger side wheel well/fender area.. A poor engine or chassis ground can introduce electrical noise or cause voltage drops to various sensors, including the camshaft position sensor, leading to intermittent signal faults like P0344.

Real Owner Repair Stories

• YouTube channel 'Repairs and Stuff' (Dodge 5.7L HEMI (similar VVT system to 6.4L)) — P0344 code, intermittent check engine light. Light would come on more frequently before sensor replacement, but still returned after.
  ❌ Tried (didn't work) Replacing the camshaft position sensor with an aftermarket part., Extensive electrical testing including wiggle tests and resistance checks from the PCM.
  ✅ What actually fixed it An oil change. The technician concluded that dirty or low oil was affecting the VVT system, which in turn caused the intermittent cam signal fault. The fix was confirmed after a 50-mile test drive with no check engine light.
• RamForum.com user (2014 Ram 2500 6.4L HEMI, 105,000 miles) — P0344, traction control light, engine surges below 2000 RPM and falls on its face above that. Also noted a rapid electrical buzzing/cycling noise when MDS (Multi-Displacement System) was active.
  ❌ Tried (didn't work) Replacing the camshaft position sensor., Replacing the camshaft position sensor connector pigtail.
  ✅ What actually fixed it The user found that manually turning off the MDS system prevented the code from returning. While not a final component fix, this strongly suggests the fault is related to the VVT/MDS system, possibly a failing VVT solenoid that becomes unstable when MDS activates.
• Reddit user on r/AskAMechanic (2007 Ram 1500 4.7L (demonstrates a relevant mechanical failure)) — Persistent P0344 code for over a year.
  ❌ Tried (didn't work) Replacing the camshaft position sensor multiple times., Replacing the crankshaft position sensor., Replacing coil packs and spark plugs.
  ✅ What actually fixed it A responding technician suggested the root cause was likely a damaged or loose tone wheel on the camshaft that the sensor reads, which is a mechanical failure, not an electrical one.

"I Checked Everything" — The Actual Cause

• A technician documented a case on a 5.7L HEMI where all electrical diagnostics for P0344 passed perfectly—wiring continuity was good, wiggle tests showed no faults, and voltages appeared correct. After hours of chasing an electrical 'ghost', the actual cause was found to be dirty engine oil. An oil change resolved the code completely, indicating the problem was not in the electrical circuit but in the oil-pressure-driven VVT system that the cam sensor monitors.

OEM Part Supersession History

• 5149054AA, 5149054AB → 5149054AC — Standard part revision and update by the manufacturer for the 6.4L HEMI sensor.
  Heads up: Using the latest revision (5149054AC) is recommended. Older stock is not advised.

Model Year Variations Within This Range

• 2018: A specific PCM software update, TSB 18-036-20, was released for 2018 Ram 2500/3500 trucks with the 6.4L HEMI. This flash addresses several potential DTCs and includes an optional software path specifically to resolve customer complaints of drone, shudder, or vibration when the MDS is active. Since P0344 can be linked to VVT/MDS issues, this PCM update may be a relevant fix for 2018 models.