when i'm applying breaks to stop sign /let say/ and accelerating after the engine just make this sound like skiping one gear or something like that.....it doesn't feel good just now i'm dealing with the sparkling plugs and I will do fuel injector cleaning.....let see what happens p.s. Lee you are th...

I am experiencing the same problem......didi you find solution for the problem.....anyone any idea

I am going to relace the spark plugs...

do I have to have any cods showing for the problems you post allready....if I don't have any what is the most common problem that caused that....thanks

thanks for the answer.......
i don't have any light on and i recently ran obd2 and it didn't detect any codes............
Thanks!!!

ok please help me out here.... my car 2000 s70 is making this stumbling sound...its not like all the time but especially when I'm slowing down and accelerate after I can here or feel this stumbling or cracking which I think is coming from the engine or something very close to it......pls give me som...

By the way the exact info from the repair papers is ENGINE CODE IS 1671..MANUFACTURE CONTROLLED COMPUTER OUTPUT CIRCUT. RECOMMENDED DEALER I just found the same number (1671) with P in front of the code And just 1 more thing, the car idle at 900 r/min....i think it should be 800 r/min ............ i...

Thanks guys for the replay....... The car run fine..the only think is when i am slowing down and then accelerating i feel something like is skipping one gear or something..... Today i disconnect the battery for half hour the check engine light was off but in 13miles of driving came back on...... thi...

My check engine light is on like 3-4 days so i went to car repair shop to check the car (volvo s 70).....the code is P1671
So far this is the info i found:DTC P1671 Driver 4 Line 1
No idea what means
If somebody can help me understand what this mean