P0344: Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)
4 vehicles · 2 makes · $150-$4,500 repair
Most Reported On
P0344 is an OBD-II diagnostic trouble code meaning “Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor).” P0344 is a generic OBD-II code indicating the engine computer detected an intermittent or erratic signal from the camshaft position sensor 'A' on bank 1 (or the single sensor on inline engines). This sensor reports the camshaft's position so the computer can correctly time fuel injection and ignition. An intermittent signal means the data is dropping out momentarily, which can cause hard starting, stalling, hesitation, or rough running. It often points to a wiring or connection problem rather than an outright sensor failure. This code is most commonly reported on 2000-2010 Ford Explorer, 2000-2011 Ford Ranger, and 1997-2004 Ford F-150 (XL, XLT, Lariat, FX4, King Ranch), plus 1 other vehicle, with repair costs ranging from $150 to $4,500.
Common Causes
Typical Repair Cost
Based on 6 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0344, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (4)
Timing Chain Cassette and Guide Failure on 4.0L SOHC V6
Camshaft Synchronizer Chirp and Oil Pump Drive Failure on 3.0L/4.0L V6
4.6L / 5.4L 2-Valve Triton Timing Chain Tensioner and Plastic Guide Rattle
4.0L SOHC Camshaft Position Sensor and Synchronizer Failure Causing P0340 Misfire and Stalling
Camshaft synchronizer / CMP sensor bushing failure
FAQ
What does P0344 mean?
P0344 stands for "Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)." P0344 is a generic OBD-II code indicating the engine computer detected an intermittent or erratic signal from the camshaft position sensor 'A' on bank 1 (or the single sensor on inline engines). This sensor reports the camshaft's position so the computer can correctly time fuel injection and ignition. An intermittent signal means the data is dropping out momentarily, which can cause hard starting, stalling, hesitation, or rough running. It often points to a wiring or connection problem rather than an outright sensor failure.
What are the most common causes of P0344?
The most common causes of P0344 are: Loose, corroded, or chafed camshaft sensor wiring/connector, Failing camshaft position sensor, Intermittent open or short in the circuit, Damaged or contaminated reluctor/tone ring, Excessive air gap or debris at the sensor tip, Poor ground or unstable power supply, Worn timing components affecting sensor signal. The specific cause varies by vehicle.
How much does it cost to fix P0344?
Repair costs for P0344 range from $150 to $4,500, depending on the vehicle and root cause.
Which vehicles are affected by P0344?
Au7o has documented P0344 across 4 vehicle models from 2 manufacturers: Ford, Jeep.
Sources (10)
- ForumThe Ranger Station forum discussions on cam synchronizer chirp and replacement
- articleThe Ford Triton Timing Chain Problem and Solution — FixMyOldRide
- ForumStartup Rattle After New Timing Set — F150Forum
- ForumReplacing Camshaft Synchronizer and Position Sensor — Ford Explorer Forums
- ForumCamshaft Position Sensor on 99 Sport 4.0 SOHC — Ford Explorer Forums
- articleSynchronizer Shaft For The Camshaft Position Sensor May Make Noise (RepairPal)
- ForumHelpful thread, for squeak, squeal, chirp noise from V8 and OHV v6 engine compartment - Ford Explorer Forums
- ForumCam synchronizer emergency! 4.0 OHV - Ford Explorer Forums
- TSBChrysler TSB 09-003-05 regarding 2005 Wrangler 4.0L OPDA/cam sensor assembly concerns
- ForumWranglerForum and JeepForum owner threads documenting 2005-2006 OPDA 'screaming monkey' failures
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.