Petrol Diagnostics

Post a Response

Vauxhall Astra H Z18XE 2004 Auto - Lambda fault, code P0134 & P0170 #

Posted by Phil Dunmore on October 11, 2011, 11:58 am

Year of Manufacture *: 2004
Engine Size and Code *: Z18XE
( Optional ) ECU Type: Simtec 71.6
( Optional ) Scanner Used: Tech 2
( Optional) Fault Codes: P0134 P0170

P0134 Oxygen sensor no output.
P0170 Fuel system trim rich.
Sensor replaced(twice) with correct NTK part. Faults return after a few days use.
Customer complains of a hesitation, usually when cold. We have not experienced any drivability problems.
Sensor switching appears normal on Tech 2 live plot.

TIS for P0170 says sensor rich for 60secs.
TIS for P0134 says no sensor output.
Checking procedure says to check O2 harness pin 2 voltage with Tech 2 or DMM, sensor disconnected. Tech 2 switches 410 to 429mv(one or other at random). DMM 420mv. TIS says if less than 450mv short between sensor and ECU or ECU faulty. Disconnecting engine side of ECU, Tech 2 same readings.

Only logic I can draw from this is a faulty ECU. Anyone been here before?

Re: Vauxhall Astra H automatic, lambda/ECU problem

Posted by martin simonsohn <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat3223' width='330' height='300' border=0 style='border:none;'> on October 11, 2011, 12:57 pm, in reply to "Vauxhall Astra H automatic, lambda/ECU problem"
Martin Simonsohn

hi have had similar problems with z18xe both had no activity from o2 sensor both had earth isues at the sensor ground and the ecu.
earthed the ecu one started to work ok the other had a replacment ecu
hth martin

« Back to index

[ Petrol Diagnostics ]