Fabia 1.2 BMD about 55k on the clock IIRC.

 

Driving around this morning the CEL came on.

 

I've changed the o2 sensor not long ago as I was having a different CEL code come up before that. Did an autoscan and found this:
 

Address 01: Engine        Labels: Redir Fail!
   Part No: 03D 906 023 B
   Component: SIMOS91 1.2l 2V     1412  
   Revision: --H04---    Serial number: SKZ7Z0F3667429
   Coding: 0000071
   Shop #: WSC 13765 000 00000
   VCID: 1D3655E4C714516E00-5160

1 Fault Found:
16555 - Fuel Trim; Bank 1
            P0171 - 006 - System Too Lean
Readiness: 0010 0000

 

I had a quick look and it points towards a potentially faulty/dirty map sensor?

 

Any suggestions/advice welcome on if I'm right/wrong what it could be.

 

Nah, just clear all the codes to reset the dynamic map and forget about it.

Cleaned the sensor a little earlier with carb cleaner but have reset now.

 

Thanks. Will keep an eye on it.

Same error again today.

 

Is this due to driving the car in different ways (errors comes up with low revs after driving highly revved and with a heavy foot for a while)?

Check this: 

 

Thank you. Will have a look around the engine bay when I get another chance. 

Presumably spraying a bit of carb cleaner around that area will result in higher revs if there's a hole?

Edited 13 July, 20205 yr by bspman

No, the thing to do is just flex that shiny bit of pipe upwards, if it's leaking at the same point, you'll hear a pronounced hiss of air entry, and the engine will stutter/bog down.

I think the trouble is, due to the design of the joint, oily stuff will sit at the bottom of that rubbery coupler piece all the time, gradually softening and rotting it out.  Then with a bit of engine vibration, it just cracks through and starts to leak.

Pipe moved around. No hissing, touching it, no apparent break and no change in idle.

EGR hole covered, No apparent change in revs.

 

Investigation will continue later tonight/tomorrow after I'm done with office work.

 

 

That's the PCV valve, no EGR on a BMD. 

You've checked the brake servo hose, right? At the point where the rigid plastic hose sections join onto the one-way valve, either side of it.  Just near the ECU.

Not yet. Will try and check a little later tonight and let you know how I get on. 

I'd be surprised if that isn't leaking, in the circumstances.

Wiggled them all - made seemingly no difference 😞 Also felt around the rubber bits for any holes/drafts.

 

No joy.

 

Time for a bit of carb cleaner tomorrow I guess.

Can you post a photo or two of the non-return valve in the brake servo line, one from topside, one from underneath.  You're looking for this kind of thing:

 

 

I have a silly question. Is the loop that goes into the pcv supposed to come out easily?

Edited 13 July, 20205 yr by bspman

The hard plastic loop of the PCV pipework  is just a push-fit into the rubber couplers at each end, so will move in/out without huge effort. If it was loose enough to leak, I think you'd hear hissing when wiggling it about. Add a cable-tie or two to snug it down if it seems too loose?

 

Brake servo hose is looking unusually intact!

Edited 13 July, 20205 yr by Wino

Wondering if the crack in the first pic might be to blame on the intake (left of hose and clamp).. or that notch in the 2nd pic on the intake (top of 2nd pic, slightly right of hose). Small gap but will try and get a better pic tomorrow.

 

This picture is looking up on the drivers side(rhd) looking up . Left is the intake manifold and right is the pcv pipe

 

This picture is on the driver's side (rhd) looking down on the pcv side to the rear of the engine.

Edited 13 July, 20205 yr by bspman

Next steps in the diagnosis process is to take VCDS and check a few figures before and after zip tying the PCV pipes. 

 

The cracks/separation on the intake manifold are looking mostly superficial. Holding fingers over them (or trying anyway) I couldn't feel any draft. 

 

WIll add more specific details once I've actually done it.