Hi Guys

Im selling my octavia (need a van going to miss it massively best car ive ever owned by a mile) and really want it to be right for the next owner so im looking to fix a couple of issues the car has at the minute

Ive recently cleaned the throttle body

Had error codes before for the front 02 sensor so replaced it and now im getting the following error codes

16891 Idle Control System Higher than Expected

17544 Long Term Fuel Trim Add.Fuel,Bank1 System too Lean

Any ideas on how i can fix these?

Cheers Matt

Ps this website is pretty usefull, prob been mentioned before but i think its brilliant

VW Online Technical Library - Diagnostic Trouble Codes (DTC) Tables

Matt

Try this web site as well :- Main Page - Ross-Tech Wiki then look under fault codes

anyway I did a search and found this :-

16891/P0507/001287 - Idle Control System RPM: Higher than Expected.

Possible Symptoms

• Malfunction Indicator Lamp (MIL) active
  

Possible Causes

• Throttle Valve Control Module (J338) dirty/faulty
  
• Wiring/Connector(s) from/to Throttle Valve Control Module (J338)
  

Possible Solutions

• Check Throttle Valve Control Module (J338)
  
• Check Wiring/Connector(s) from/to Throttle Valve Control Module (J338)
  

17544/P1136/004406 - Fuel Trim: Bank 1 (Add): System too Lean

Possible Solutions

• Check Mass Air Flow (MAF) Sensor
  
• Check Fuel Pressure Regulator
  
• Check Fuel Pump
  
• Check Intake/Exhaust System for Leaks
  
• Check Secondary Air Injection for Leaks
  
• Check Vacuum Lines for Leaks
  

Peter

Thank you sir i was just outside listening to it i think i have a slight air leak. That might explain the second one.

Ill get a photo of the offending pipe hopefully someone can tell me which pipe it is etc

Lean will normally be Vac leak as extra air is being drawn into the system after the MAF. So I'll have a guess its the Y shaped pipe on the right of the engine? (very popular one to go) VW GOLF/BORA MK4 1.8T 20VT SILICONE BREATHER PIPES AUM on eBay (end time 13-Sep-09 21:27:19 BST)

Cheers mate

Im going to have a really good look at this on friday and see if i can identify the culprit.

Cheers Matt

Yeah the second code is a common one for leaking breather hoses.

Either the Y-piece off the rocker cover, or the S-hose from the T-piece to inlet manifold. That one's under the manifold, to the right hand side. You can get your hand on it to feel for leaks easily enough.

With the 1st code, did you disconnect the TB when you cleaned it? And did you perform a reset if you did disconnect it? I'd clear that code and see if it goes away, as the TB should self adjust after a few miles.

Yeah the second code is a common one for leaking breather hoses.

Either the Y-piece off the rocker cover, or the S-hose from the T-piece to inlet manifold. That one's under the manifold, to the right hand side. You can get your hand on it to feel for leaks easily enough.

With the 1st code, did you disconnect the TB when you cleaned it? And did you perform a reset if you did disconnect it? I'd clear that code and see if it goes away, as the TB should self adjust after a few miles.

Cheers Buddy

These are all things on my list of things to do tommorow!

i didnt disconnect it. I only have a handheld scanner not vagcom so couldnt reset it if i disconnected it.

i know this is cheeky but dont suppose you could post a pic of the engine bay and an arrow to explain which pipe you mean?

Cheers Matt