P0342
Fix within a few daysThe engine's computer (ECM) is receiving a signal from the camshaft position sensor that is too low. This sensor tells the computer where the camshaft is, which is critical for engine timing.
Code P0342 means your engine's camshaft position sensor signal is too low. Common causes: Bad camshaft position sensor (70%), wiring issues (20%), or timing problems (8%). Drivability: Yes, for short trips if it runs, but fix quickly. Repair cost: $50-$200 DIY, $150-$500 professional.
Can I Drive With P0342?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy traffic. Be prepared for potential stalling.
Stop driving immediately if: Engine won't start, engine stalls repeatedly, significant loss of power, or any loud abnormal engine noises.
Symptoms of P0342
- 1Engine is hard to start or won't start at all
- 2Engine stalls unexpectedly
- 3Rough idle or engine runs poorly
- 4Reduced engine power or acceleration
- 5Check Engine Light is on
Common Causes of P0342
Parts most likely causing this code, ranked by probability
The sensor itself has failed internally and is sending an incorrect or no signal to the engine computer.
70% of P0342 cases are fixed by replacing this part
Damaged, corroded, or loose wiring or a faulty connector prevents the sensor's signal from reaching the engine computer correctly.
20% of P0342 cases are fixed by repairing the wiring or connector
A stretched timing chain, jumped timing belt, or other mechanical timing issue causes the camshaft to be out of sync, leading the sensor to report an incorrect signal.
8% of P0342 cases are fixed by addressing timing component issues
A rare internal fault within the engine computer prevents it from correctly processing the camshaft position sensor's signal.
2% of P0342 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 corrosion, bent pins, or a loose connection.
- Trace the wiring harness from the sensor as far as you can, looking for any obvious damage, fraying, or signs of rodent chewing.
How to Diagnose P0342
- 1Visually inspect the camshaft position sensor and its electrical connector for damage, corrosion, or loose connections.
- 2Check the wiring harness leading to the camshaft position sensor for any signs of fraying, cuts, or heat damage.
- 3Using a multimeter, test for proper voltage supply (usually 5V or 12V) and ground at the camshaft position sensor connector.
- 4If possible, test the resistance or signal output of the camshaft position sensor itself (specifications vary by vehicle).
- 5Use a scan tool to monitor live data for the camshaft position sensor signal while cranking or running the engine.
- 6If the sensor and wiring check out, inspect the engine's timing chain or belt for proper tension and alignment.
P0342 on Popular Vehicles
Toyota Camry
2007-2024Camshaft position sensor failures are common. The sensor is usually accessible on the cylinder head.
75% fixed by replacing the Camshaft Position Sensor
Honda Accord
2003-2024Similar to Toyota, CPS failures are a frequent cause. Inspect the connector carefully for corrosion.
70% fixed by replacing the Camshaft Position Sensor
Ford F-150
2004-2024On V8 engines, while the sensor is common, P0342 can sometimes be an early indicator of VVT solenoid issues or timing chain stretch, especially if accompanied by other timing-related codes.
65% fixed by replacing the Camshaft Position Sensor
Frequently Asked Questions
What does P0342 mean?
P0342 indicates that your engine's computer is receiving a low voltage signal from the camshaft position sensor on Bank 1 (or the single sensor if your engine only has one). This sensor is crucial for the computer to know the exact position of the camshaft for proper engine timing.
Can I drive with P0342?
Yes, for short trips only, if the engine starts and runs. If your engine is hard to start, stalls frequently, or has significant power loss, limit driving to essential trips under 10 miles. If the engine won't start, do not drive it.
Will P0342 clear itself?
No, P0342 will not clear itself. The underlying issue causing the low signal must be diagnosed and repaired. Once the repair is complete, you can clear the code with a scan tool, or it will clear after several drive cycles if the problem is resolved.
How do I fix P0342 myself?
Start by inspecting the camshaft position sensor's wiring and connector for damage. If they look good, replace the camshaft position sensor. If the problem persists, you will need to perform more advanced electrical diagnostics on the wiring or inspect engine timing components.
How much does it cost to fix P0342?
A DIY fix for P0342, typically involving replacing the camshaft position sensor, costs $30-$150 for the part. Professional repair at a shop will cost $150-$500, including parts and labor. If the issue is a timing chain/belt, costs can be significantly higher.
P0342 keeps coming back - why?
If P0342 keeps returning, it means the initial repair did not address the root cause. Common reasons for recurrence include: a faulty new sensor, undetected wiring damage, an issue with the crankshaft position sensor, or a mechanical engine timing problem (like a stretched timing chain) that was overlooked.
Will P0342 fail emissions/smog test?
Yes, P0342 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on, regardless of the code, is an automatic failure in states with inspection programs.
What's the difference between P0342 and P0340?
P0340 is a general 'Camshaft Position Sensor Circuit Malfunction' indicating a problem with the circuit but not specifying the nature. P0342 is more specific, indicating a 'low input' signal from the camshaft position sensor circuit, pointing to a low voltage condition.
P0342 on Ford F-150
On Ford F-150s, P0342 is commonly caused by a failing camshaft position sensor, especially on higher mileage vehicles. The wiring harness can also become brittle or corroded over time. Less commonly, especially on V8 engines, it can point to issues with the variable valve timing (VVT) system or a stretched timing chain.
Questions to Ask Your Mechanic
Did you check the voltage supply and ground at the camshaft position sensor connector?
Good answer: Yes, I confirmed the sensor is receiving proper voltage and has a good ground. The issue is either the sensor itself or the signal wire.
What did you find when you inspected the wiring harness for the camshaft position sensor?
Good answer: I thoroughly checked the wiring from the sensor back to the ECM for any breaks, shorts, or corrosion, and it all looks good.
Repair Cost Estimate
DIY Repair
Parts only
$30-$150
Shop Repair
Parts + labor
$150-$500
Save $120-$350 by doing it yourself
Difficulty
intermediate
Time
0.5-2 hours
Intermediate - While replacing the sensor itself is often beginner-friendly, diagnosing wiring issues or mechanical timing problems requires more advanced tools and knowledge.
Cost of Waiting
Ignoring P0342 can lead to your engine stalling unexpectedly, making driving dangerous. Continued poor engine timing can also put stress on other engine components, potentially leading to more expensive repairs down the road. A $50-$150 sensor replacement now prevents potential towing costs or further engine damage.
While You're In There...
The ECM uses both camshaft and crankshaft position sensors to determine engine timing. If one is failing, the other might be stressed or could be the true underlying issue, especially if symptoms persist after replacing the CPS.
If the engine has been running poorly or misfiring due to the P0342 code, ignition coils can be stressed. Replacing them can restore optimal ignition performance.
Tools You'll Need
- OBD-II Scan Tool
- Multimeter
- Socket set
- Wrench set
- Wire strippers/crimpers (if wiring repair needed)
P0342 is a common sensor code. Most repairs are straightforward, often just replacing the camshaft position sensor, and your engine will run smoothly again.
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Your Next Steps
Step 1: Check the camshaft position sensor's connector and wiring for any visible damage or looseness. Ensure it's fully seated.
Step 2: If the visual inspection doesn't reveal anything, replace the camshaft position sensor. This is the most common fix.
Step 3: If the code returns after replacing the sensor, use a multimeter to test the voltage supply and ground at the sensor connector. If those are good, you'll need to check the signal wire for continuity back to the ECM. Consider professional diagnosis if wiring is complex or timing issues are suspected.