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Z16XEP P0170 egr channels and p0201....

2 reading
28K views 74 replies 6 participants last post by  andy_v  
#1 ·
Vauxhall Astra H (Mk5) 2006

1.6 Petrol - Twinport

Z16XEP

Hi, I come here tonight seeking help or two fronts.

I have a P0170 engine running lean fault for the past 6 months. For the past few months the car really struggles in first gear (juddering). I have replaced air filter, oil and filter change, new spark plugs.

Over the past fortnight or so I have noticed a real loss of power. After clearing the code, the eml has finally returned and it brought my old friend p0170 but with company this time, p0201, p0202, p0203m p0204. (cylinder 1 injector circuit, 2 etc etc)

Due to good fortune I have a few days free to try and resolve it. Admittedly a complete novice, I’m in the process of trying to remove the inlet manifold to clean the egr channels hoping to resolve p0170. That’s the first request for help, I’m a little bit stuck and hope you can help me finish the job.

The other question related to the new codes, could they be related to my original fault, or could it be ecu or a fuel related issue?

1. I have removed, air flow, ecu, throttle body and roughly 18 bolts from the inlet manifold. One bolt remains pictured below. Struggling to remove it but will crack at it in the morning again. I would expect with 18 bolts removed that there would be more movement but it seems firmly secured. Am I missing something obvious?

2. Also this brake servo vacuum hose is proving very difficult. I can see a something screw like underneath but can’t get access to it with the design of the unit. Is there another way to remove this?

Thanks,
 

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#61 ·
Update for you. Car runs fine. Disconnected battery overnight, cleared codes with obd2 reader and started the car 30 odd times. 111306 and lambda sensor code still on pedal test. Only emissions light on now and not the spanner light. The spanner light comes on for a few minutes after I do the pedal test but then disappears permanently. 111306 does not show on obd2 reader, only lambda sensor. Will buy opcom I guess to see what is going on. Thanks again everyone
 
#65 ·
So my take it on it is;
  • that the lambda sensor, (sensor 2 - Bottom of cat) needs replaced.

  • The Fault code in relation to actuator valve, is either
  1. Something is disconnected (very unlikely)
  2. I haven't screwed it on enough after I disconnected it
  3. Or needs adjusting to read 0.5v.
It's odd that it is reading 0v?

  • The p0400-63 is generally related to egr valve I'm guessing, could this be being flagged due to fault with twinport system?