2001 Vauxhall Zafira fault codes P1120/P1122

Tiny
GARRYROB
  • MEMBER
  • 2001 VAUXHALL ZAFIRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 85,000 MILES
Hi, ive just got hold of a 1600 16v zafira 2001 with a blown head gasket.I replaced the gasket and had the head skimmed. On road test it was holding back on light throttle. Egr and rear o2 sensor codes stored and it smoked badly when starting. Ive put a set of rings in it(sorted the smoking)and changed the egr valve.I also cleaned out the throttle body. The problem ive got now is p1120 and p1122 and its in limp home mode. The codes wont clear. Any ideas?Is it the ecu?
Friday, April 16th, 2010 AT 2:00 PM

4 Replies

Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
The codes are for TPS (throttle position sensor). Check the TPS is giving the correct reading's. Check the wiring and connector for the TPS. Or replace the TPS. Check the air filter is good. Check the wiring and connector for the MAF (mass airflow) sensor. Check the readings for the MAF. Or replace the MAF. It could be a bad PCM/ECU. But I would go the route the codes ar giving me first (TPS/MAF)
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Saturday, April 17th, 2010 AT 3:28 AM
Tiny
GARRYROB
  • MEMBER
  • 2 POSTS
Thanks for the reply. I sorted it this morning. The cause was a bent pin on 1 of the ecu connections! IT Obviously happened when I reconnected the plugs on to the ecu.
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Saturday, April 17th, 2010 AT 8:56 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Thanks for letting us know your final fix .. please use our forum again in the future and spread the word to family and friends ..

Happy motoring


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Saturday, April 17th, 2010 AT 3:36 PM
Tiny
PRENDER77
  • MEMBER
  • 1 POST
Hey lad
i have a similar problem started today.
I have 2007 opel zafira 1.6 petrol manual. So I did pedal test and got ecn112052. So im guessing it has something to do with pedal sensor etc. Also when car is idle the rev's go up a good bit fop a few seconds. Could this be an easy fix as im a bit concerned

thank you
roy
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Wednesday, May 13th, 2015 AT 8:43 AM

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