Lexus GS450H P0016 code. Check engine on
12-02-16, 06:58 AM
#1
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Thread Starter
Lexus GS450H Cold start problem
Hello guys. I need some help regarding a 2007 Lexus GS450h with 100k miles. The problem is very strange in my opinion. Sometimes when the car idles specially in heavy traffic and the engine stops and starts allot of times to recharge the batteries the check engine light comes on. Even with the CEL on everything is running perfect, no limp mode, or anything regarding a power surge. I plugged in my obd2 reader and it gives me the p0016 fault. Camshaft corelation or something like this.
I observed that this fault only occurs when the car is iddling allot in very heavy traffic (ex. one miles in one hour) in my country traffic jams are a very common thing
If i delete it i can travel for weeks and it doesen't come on.
Is it something i shoud worry about? I heavn't reached a Lexus dealer yet. The car had all the recalls done(valve springs and stuff). Thank you and excuse my bad english.
This problem has been fixed (post #15), please read the last post(post #16) on the second page. Thank you very much!
I observed that this fault only occurs when the car is iddling allot in very heavy traffic (ex. one miles in one hour) in my country traffic jams are a very common thing
If i delete it i can travel for weeks and it doesen't come on.Is it something i shoud worry about? I heavn't reached a Lexus dealer yet. The car had all the recalls done(valve springs and stuff). Thank you and excuse my bad english.
This problem has been fixed (post #15), please read the last post(post #16) on the second page. Thank you very much!
Last edited by alexchris1; 01-24-17 at 08:58 AM.
12-02-16, 11:11 AM
#2
Welcome to CL!
Here's some info on the error code: https://www.yourmechanic.com/article...by-jay-safford
Briefly, the crankshaft and camshaft have a very specific relationship between their rotational positions, which is set at the factory and should never change – this ensures that the valves can't open at the wrong time and possibly hit the piston (usually resulting in catastrophic engine damage). The engine has sensors to detect the rotational position of each cam shaft and the crankshaft, so you'll know if the relationship changes for whatever reason. P0016 means that the camshaft position sensor is telling the car that the timing is off on one of the camshafts. At best, this means the sensor may need replacing for giving incorrect signals – at worst, the timing is actually off and can cause catastrophic engine damage. Since the problem is intermittent and the car is working normally, I would guess it's the sensor. Either way, get it into the dealer or a good independent shop and have it diagnosed and fixed
Oh and your English is better than quite a few people I know who speak it as their native language
Here's some info on the error code: https://www.yourmechanic.com/article...by-jay-safford
Briefly, the crankshaft and camshaft have a very specific relationship between their rotational positions, which is set at the factory and should never change – this ensures that the valves can't open at the wrong time and possibly hit the piston (usually resulting in catastrophic engine damage). The engine has sensors to detect the rotational position of each cam shaft and the crankshaft, so you'll know if the relationship changes for whatever reason. P0016 means that the camshaft position sensor is telling the car that the timing is off on one of the camshafts. At best, this means the sensor may need replacing for giving incorrect signals – at worst, the timing is actually off and can cause catastrophic engine damage. Since the problem is intermittent and the car is working normally, I would guess it's the sensor. Either way, get it into the dealer or a good independent shop and have it diagnosed and fixed
Oh and your English is better than quite a few people I know who speak it as their native language
12-03-16, 09:33 AM
#3
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Thread Starter
Thank you very much for your answer. I think you are definitely right. Today i had about 250 miles with citys and highways and mountain roads. Traffic was moderate and the car run flawlessly. The CEL lights up only when the engine stop and starts allot of times on idle to power up the battery's. Strange thing is that i saw this only occurs only when the batteries are completely empty.
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alexchris1 (12-15-16)
12-06-16, 03:19 PM
#6
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Thread Starter
Just a little update. Today a plugged in again my obd reader. The CEL did not went on but i was curious to see the rpm at idle on the engine. It idles at 990-998 rpm but this sound ok to me. The strange thing is that i checked for errors and i had a p0017 but it was in pending. Something i shoud worry about? i did not have time to check the sensors. Vehicle is running great
12-08-16, 01:34 AM
#7
P0017 is the same as P0016, but for one of your other cam shafts
http://www.autocodes.com/p0017_toyota.html
Since you're getting both codes, it's probably not a bad idea to get your car looked at sooner rather than later
http://www.autocodes.com/p0017_toyota.html
Since you're getting both codes, it's probably not a bad idea to get your car looked at sooner rather than later
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alexchris1 (12-15-16)
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12-15-16, 03:03 PM
#8
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Ok so after a week and so everything was perfect, no errors car runned great until... I left the car for 3 days in the garage. In my country it is pretty could this time of year. I started the car it ran great for a couple of seconds and then the idle began to be very rough. Check engine light came on and it started flashing. I restarted the car and everything was perfect. I pluged in my obd reader and it only gave me: "p0300 random multiple cylinder misfire detected".
Does anybody have any ideas? When i restarted the car everything was perfect. Thank you very much.
Does anybody have any ideas? When i restarted the car everything was perfect. Thank you very much.
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alexchris1 (12-15-16)
12-15-16, 03:54 PM
#10
Lexus Master Tech here,
While this is not a common problem, my first thought would be to check your oil level and make sure that it is correct. Many times when oil level gets low, codes related to valve timing are first to show up($). Secondly, it could be your oil control valve for the affected bank acting up($$), Third the vvt-i gear itself($$$), and finally worst case senario is that the vehicle jumped time for some reason($$$$)
While this is not a common problem, my first thought would be to check your oil level and make sure that it is correct. Many times when oil level gets low, codes related to valve timing are first to show up($). Secondly, it could be your oil control valve for the affected bank acting up($$), Third the vvt-i gear itself($$$), and finally worst case senario is that the vehicle jumped time for some reason($$$$)
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alexchris1 (12-15-16)
12-15-16, 03:55 PM
#11
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Thread Starter
The car has exactly 100 k miles and the spark plugs had never been changed. Also when the engine idles i feel a very slight lump when i am hearing the exhaust from outside.
@notadood: thank you for your answer. The oil was changed 1000 miles ago. it's been over a week and the cel did not come back for the p0016 fault.
@notadood: thank you for your answer. The oil was changed 1000 miles ago. it's been over a week and the cel did not come back for the p0016 fault.
Last edited by alexchris1; 12-15-16 at 03:58 PM.
12-15-16, 11:40 PM
#12
The car has exactly 100 k miles and the spark plugs had never been changed. Also when the engine idles i feel a very slight lump when i am hearing the exhaust from outside.
@notadood: thank you for your answer. The oil was changed 1000 miles ago. it's been over a week and the cel did not come back for the p0016 fault.
@notadood: thank you for your answer. The oil was changed 1000 miles ago. it's been over a week and the cel did not come back for the p0016 fault.
Did all these problems start happening after the oil change?
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alexchris1 (01-24-17)
12-15-16, 11:50 PM
#13
Lexus Master Tech here,
While this is not a common problem, my first thought would be to check your oil level and make sure that it is correct. Many times when oil level gets low, codes related to valve timing are first to show up($). Secondly, it could be your oil control valve for the affected bank acting up($$), Third the vvt-i gear itself($$$), and finally worst case senario is that the vehicle jumped time for some reason($$$$)
While this is not a common problem, my first thought would be to check your oil level and make sure that it is correct. Many times when oil level gets low, codes related to valve timing are first to show up($). Secondly, it could be your oil control valve for the affected bank acting up($$), Third the vvt-i gear itself($$$), and finally worst case senario is that the vehicle jumped time for some reason($$$$)
12-16-16, 02:54 AM
#14
Rookie
Thread Starter
Since i got the cat i saw that it has a very slight lump when idle. Now after the car wad sitting for a couple of this it started like s***. I cleaned the maf, the tb and when I changed the oil new air filter was mounted. I will change the spark plugs next week. I will keep you guys informed.
12-24-16, 03:26 PM
#15
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Thread Starter
Ok so I think i can say everything is very ok. The CEL did not come on since the beginning of this post, i got an advice from another Lexus club to clean the VVTI Cam filter because they can get clogged and cause the light to come up. Also i changed the spark plugs. Two of them looked pretty bad. About the misfires, the strange thing is that the problem i think was related to the oil dipstick not plugged in correctly. Probably it was a vacuum leak because when i plugged the dipstick correctly, the engine cold started fine and this was before i changed the spark plugs. Anyway guys thank you allot for your help for all the good advice about my problems. I will keep this topic updated in case others need help.
