Bad Camshaft Position Sensor Symptoms: 7 Telltale Signs
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- Опубликовано: 10 ноя 2023
- Brian: Hi everyone, Brian here from Honest Mechanic Colorado. Today we're getting into the nitty-gritty of the camshaft position sensor and how to tell if it's going bad.
The camshaft position sensor is a crucial part of your vehicle's engine. It monitors the camshaft's position and speed, providing data essential for managing the engine's timing, fuel injection, and ignition systems.
It's easy to confuse this with the crankshaft position sensor. While both are key to your engine's performance, they serve different purposes. The crankshaft sensor keeps tabs on the crankshaft's position, while the camshaft sensor focuses on the camshaft's activities.
Brian: “Now, let's talk about the symptoms of a failing camshaft position sensor. This is where things get interesting.”
Check Engine Light: "The most common sign is your check engine light. If this light pops on, it could indicate a problem with the sensor."
Engine Performance Issues: "Your engine might start acting up - think rough idling, stalling, or even difficulty in starting. These are signs that the sensor isn't tracking the camshaft's position accurately."
Reduced Power and Acceleration: "If your car feels sluggish or isn't accelerating like it should, a faulty camshaft position sensor could be to blame."
Increased Fuel Consumption: "Notice your car's thirst for fuel has gone up? That's another red flag. A malfunctioning sensor can cause the engine to run inefficiently, leading to higher fuel consumption."
Engine Misfires: "An irregular or sporadic engine misfire can often be traced back to this little sensor. It's all about timing, and when the sensor fails, the timing goes haywire."
Vehicle Stalling: "Unexpected stalling, especially at low speeds or when idling, is a symptom you shouldn't ignore. This happens when the sensor sends erratic signals, causing the engine to shut off."
Difficulty Starting the Vehicle: "Last but not least, if you're having a hard time getting your car to start, the camshaft position sensor could be the culprit. It's responsible for proper ignition timing, and if it's off, so is your start-up."
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What does a camshaft position sensor do?
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How to know if your camshaft position sensor is failing?
Why is my check engine light on?
How does a camshaft position sensor work? 
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I changed the oil in my Bmw, changed the vanos solenoids, and it threw a check engine light for camshaft position sensor (timing retarded bank 1&2) I replaced the cam sensors, then it threw a code for fuel pumps and a code for (transmission fluid deteriorated) I replaced fuel pumps, then it was back to cam shaft timing retarded again.. I replaced coil packs, and spark plugs. It was still throwing engine code for cam sensor, and have a check engine light. I replaced camshaft gears, and timing chain.. Still had the code.. It ended up being the crankshaft sensor which was not throwing a code, but made the camshaft sensors throw a code because they weren't reading correctly. 600 bucks, and hating myself a week later... I repaired it, with a crank sensor. (P0012-P0015) are camshaft position codes, but if they can't read what's coming from the crank they read incorrectly. Will also throw transmission codes, cause ruff idle, horrible performance, misfires, and a head scratching disease.
Honest mechanic... an unicorn of our time 😂 Thanks for explaining
Haha. Happy to help!
Very well said .. thank you sir
Thanks and welcome
Hi, nice work,
I am frim Nigeria,I love your videos,
I have a p0016 and p0705 issue with my 2007 corolla 1zz engine,
Please can you throw more light on this codes for me?
Hi there, I'm glad you enjoy the videos! The P0016 and P0705 codes on your 2007 Corolla with the 1ZZ engine indicate two issues:
P0016: This code means there's a misalignment between the crankshaft and camshaft position sensors. It could be due to a timing belt or chain problem, a faulty sensor, or the need for an ECM update.
P0705: This code relates to the transmission range sensor circuit. It suggests an issue with the sensor itself, its wiring, or its adjustment, affecting how the transmission reads gear selection.
Let me know if you need more help!
2006 Subaru sti with po302 . Can a faulty camshaft position sensor cause a single cylinder misfire or a crankshaft position sensor?. Having ahard time finding cause. Did compression and leakdown test all good did intake and exhaust smoke test no vacuum leaks. Swapped plugs and ignition coils from 2 to 4 cylinder. Next will be injector swap
Engine F6A after 30 meter running the engine will stop then after a few minutes will start again
Mine doesn’t show code. It’s hard starting. We already changed fuel pump. All symptoms you mentioned are showing
When you scan the vehicle, are there other codes showing?
Mine never threw a code either.
Yep a 300code
My code came up as camshaft sensor, changed both and still wont start.
Make sure timing chain hasn't jumped a tooth the valves could be out of alignment also the cam senser has to be relearned on some vehicles once a new senser has been put in also check wiring harness associated with cam senser make sure it's getting the correct voltage and check the fuses ecm relay and ecm fuses as well
Good afternoon hopefully you read my message. I had a P0343 code and it said to replace the cam shaft position sensor on my 2011 Prius. So I did that today and now After I installed it my Prius doesn’t want to start now. I still have the P0343 code checking my OB reader. What is wrong with:(
Hey Christopher, I'm sorry to hear that you're still facing issues with your Prius even after replacing the cam shaft position sensor. the next thing you should do is check the wiring harness. Examine the wiring and connectors leading to the camshaft position sensor for any signs of damage, corrosion, or loose connections. Are there other codes you getting?
I’ve checked the wiring harness and it looks fine. I keep getting back the P0343 code. I also have a check hybrid system.
That’s the only engine code I’m getting.