P0344
Fix within a few daysThe engine computer detects an intermittent signal from the camshaft position sensor on Bank 1. This sensor tells the computer the exact position of the camshaft.
Code P0344 means the camshaft position sensor signal is intermittent. Common causes: faulty camshaft position sensor (70%), wiring issues (25%). Drivability: Limit driving, fix within a few days. Repair cost: $60-$250 DIY, $150-$500 professional.
Can I Drive With P0344?
Limit driving, fix within a few days
Essential trips under 10 miles, avoid highways and heavy traffic where stalling would be dangerous.
Stop driving immediately if: Engine stalls repeatedly, will not restart, or experiences severe power loss.
Symptoms of P0344
- 1Engine cranks but won't start
- 2Engine stalls unexpectedly
- 3Rough idle or engine hesitation
- 4Reduced engine power or acceleration
- 5Check Engine Light is on
Common Causes of P0344
Parts most likely causing this code, ranked by probability
The sensor itself is failing intermittently, sending an inconsistent signal to the engine computer.
70% of P0344 cases are fixed by replacing this part
Damaged, corroded, or loose wiring or a faulty connector causes an intermittent electrical connection to the sensor.
25% of P0344 cases are fixed by repairing wiring or connector
A rare internal fault within the engine computer prevents it from correctly processing the camshaft position sensor signal.
5% of P0344 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the camshaft position sensor's electrical connector for any signs of looseness, corrosion, or damage.
- Trace the wiring harness leading to the sensor for any visible cuts, chafing, or signs of rodent damage.
How to Diagnose P0344
- 1Visually inspect the camshaft position sensor connector and wiring for damage, corrosion, or looseness.
- 2Check for any related codes, especially other P034X codes or crankshaft position sensor codes.
- 3Using a multimeter, test the voltage supply and ground at the sensor connector.
- 4Using an oscilloscope, monitor the camshaft position sensor signal for dropouts or inconsistencies while the engine is running or cranking.
- 5If the sensor signal is intermittent, replace the camshaft position sensor.
P0344 on Popular Vehicles
Toyota Camry
2007-2024Camry models often experience P0344 due to age-related failure of the camshaft position sensor itself. Wiring issues are less common but should still be inspected.
75% fixed by replacing the Camshaft Position Sensor
Honda Accord
2003-2024Similar to Toyota, Honda Accords typically see P0344 from a failing camshaft position sensor. Ensure the connector is clean and secure during inspection.
70% fixed by replacing the Camshaft Position Sensor
Ford F-150
2004-2024Ford F-150s can experience P0344 from sensor failure, but also from wiring harness issues due to engine bay heat and vibration. Thoroughly inspect the wiring for chafing or damage.
60% fixed by replacing the Camshaft Position Sensor, 30% by wiring repair
Frequently Asked Questions
What does P0344 mean?
P0344 indicates the engine computer is receiving an intermittent or inconsistent signal from the camshaft position sensor on Bank 1. This sensor is crucial for engine timing.
Can I drive with P0344?
Limit driving, fix within a few days. An intermittent camshaft sensor can cause unexpected stalling, hard starting, or reduced power, which creates unsafe driving conditions. Do not ignore this code.
Will P0344 clear itself?
No, P0344 will not clear itself. The engine computer stores this code because it detects a persistent fault. The code will remain until the underlying issue is diagnosed and repaired.
How do I fix P0344 myself?
Start by inspecting the camshaft position sensor's wiring and connector for damage or corrosion. If they look good, replacing the camshaft position sensor is the next step. You will need basic hand tools and possibly a multimeter.
How much does it cost to fix P0344?
DIY repair costs for P0344 are typically $60-$250 for a new camshaft position sensor. Professional repair costs range from $150-$500, including parts and labor.
P0344 keeps coming back - why?
If P0344 keeps returning, it means the intermittent issue persists. This often points to a deeper wiring problem that was missed, a faulty replacement sensor, or, in rare cases, an issue with the engine computer itself.
Will P0344 fail emissions/smog test?
Yes, P0344 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on automatically results in a failure in states with inspection programs.
What's the difference between P0344 and P0340?
P0340 indicates a general circuit malfunction for the camshaft position sensor on Bank 1, meaning the signal is completely absent or incorrect. P0344 specifically indicates an *intermittent* circuit malfunction, meaning the signal is present but inconsistent or drops out occasionally.
P0344 on Ford F-150
On Ford F-150s, P0344 is often caused by a failing camshaft position sensor, but also pay close attention to the wiring harness near the sensor, as it can be susceptible to chafing or corrosion, especially on older models.
Questions to Ask Your Mechanic
Did you check the camshaft position sensor signal with an oscilloscope to confirm the intermittency?
Good answer: Yes, we saw the signal drop out intermittently, confirming the sensor or its circuit is faulty.
What did you find when inspecting the wiring harness and connector for the camshaft position sensor?
Good answer: We found no visible damage or corrosion on the wiring or connector, and confirmed good continuity.
Repair Cost Estimate
DIY Repair
Parts only
$60-$250
Shop Repair
Parts + labor
$150-$500
Save $90-$250 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires careful inspection and potentially a multimeter for diagnosis, but sensor replacement is often accessible.
Cost of Waiting
Ignoring P0344 can lead to your engine stalling unexpectedly, especially at inconvenient times. Continued intermittent signals can also cause rough running, reduced fuel economy, and potentially prevent your engine from starting at all. A $60-$250 sensor replacement now prevents being stranded or needing a tow.
While You're In There...
Cleaning the electrical connector pins can resolve intermittent contact issues and is a low-cost preventative measure.
Applying dielectric grease to the connector after cleaning helps prevent corrosion and ensures a good electrical seal.
Tools You'll Need
- Basic hand tools (sockets, wrenches)
- Multimeter
- Flashlight
- Wire brush (for cleaning connectors)
- Dielectric grease
P0344 is a common sensor code. Most repairs involve replacing the camshaft position sensor, which is a straightforward job for an intermediate DIYer, and your engine will run smoothly afterward.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the camshaft position sensor's wiring and connector. Look for any frayed wires, bent pins, or corrosion. Clean any corrosion you find.
Step 2: If the visual inspection doesn't reveal any issues, test the sensor's signal using a multimeter or oscilloscope if you have access. Look for intermittent voltage drops or signal loss.
Step 3: If the sensor or wiring is confirmed faulty, replace the camshaft position sensor. Parts you'll likely need: a new camshaft position sensor.