Engine Misfire

Tiny
CHATHORN
  • MEMBER
  • 2003 VOLKSWAGEN PASSAT
  • 1.8L
  • 4 CYL
  • TURBO
  • FWD
  • AUTOMATIC
  • 183,300 MILES
I have run a diagnostic test and it throws 7 codes at me. 4 of them are telling me that there are misfires on cylinders 1, 2, and 3. The other 3 codes are something about the O2 sensor. I have replaced the air filter and spark plugs, but no change. The car idles rough, mostly at low RPM's and when I barely press on the gas.
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Sunday, September 4th, 2016 AT 4:47 PM

9 Replies

Tiny
SATURNTECH9
  • EXPERT
Can I please have the exact code numbers not code descriptions?You could have a vacuum leak.
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Sunday, September 4th, 2016 AT 8:48 PM
Tiny
CHATHORN
  • MEMBER
The codes are as follows: 16517, 16684, 16685, 16686, 16687, 17526, 17705.
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Monday, September 5th, 2016 AT 12:33 PM
Tiny
SATURNTECH9
  • EXPERT
There should be a letter followed by a four digit code for the trouble codes?
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Monday, September 5th, 2016 AT 12:46 PM
Tiny
CHATHORN
  • MEMBER
My reader is only giving me the number codes.
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Monday, September 5th, 2016 AT 12:51 PM
Tiny
SATURNTECH9
  • EXPERT
What kind of reader do you have?
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Monday, September 5th, 2016 AT 12:59 PM
Tiny
SATURNTECH9
  • EXPERT
Even the factory scan tool shows the letter followed by the four digit code.
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Monday, September 5th, 2016 AT 1:00 PM
Tiny
CHATHORN
  • MEMBER
Its a reader specifically for VW and Audi
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Tuesday, September 6th, 2016 AT 5:04 PM
Tiny
SATURNTECH9
  • EXPERT
You have misfires for cylinder 1 2 and 3 also you also have a slow response bank 1 sensor one slow response usually a lazy o2 sensor. You also have a bank 1 sensor 2 heater o2 sensor heater circuit you could have a bad heater element in that o2 sensor. The 17705 is throttle valve connection pressure loss.I would check all the turbo hoses and connections. As far as the misfires that are only at idle?I would be looking for a vacuum leak. Even the Vw factory vas laptop scan has the numbers like yours but right next to that it shows the ob2 code number the letter followed by the four digit number. That's crazy yours doesn't.
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Tuesday, September 6th, 2016 AT 5:58 PM
Tiny
SATURNTECH9
  • EXPERT
I just saw the misfire codes set with the 17705 they smoke tested and found the intake boot under the intake manifold was rotting and leaking.
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Tuesday, September 6th, 2016 AT 6:19 PM

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