Here are the most common problems that would cause a Opel Astra to idle rough. Where to Start if There’s No Code. If there’s no trouble code, it can be difficult to determine why your Astra is running rough. Check for vacuum leaks. Verify that the throttle body and MAF are clean. Inspect the spark plugs. Test the fuel pressure. Test the Rack and Pinion. May lessen or go away as your Astra warms up. Bad Power Steering Fluid. May appear dark or black. Noise free. Low tire pressure. Tire pressure light may be on. Check the pressure. Here are six of the most common reasons why your Astra’s steering wheel may be hard to turn . 4: Internal "Lock/Open Doors" button on the dash not working. 5: Car starts and drives fine. 6: Petrol cap locked too. Things i've tried: 1: Replaced the battery in the key fob and reprogrammed it in the ignition. 2: Disconnected the cars battery and left for 1 hour disconnected. 3: Checked all fuses in the engine bay and also in the boot (05-25-2017, 03:39 AM) Duracell2 Wrote: Since today, I can not start the car (Opel Astra H) but remote is working. Spare key is working without problems. what could be wrong ? if spare key is working without problem, then obviously your original key is faulty, transponder chip faulty at least now the a pillar should have something! if not, its definately that anti theft module. (brown/black wire terminals 1 to 6 on the motors) would need to check the bonnet and boot switches too. window lifters are red/white from the door locks. depending on the lights etc. it could be the combo control module/relay. Stick a new fuel filter in it,top the housing right to the top with diesel and see if it'll start,if it won't run or only runs for a short time,take the top off the filter and see what the fuel level is,if it's low then i'd be tempted to pull the strainer module from the tank and check it's clear and not full off crud or suffering from diesel Joined: Oct 2011. 5 12-24-2020, 04:53 AM. (08-12-2019, 05:09 PM)FFAUTO Wrote: hi to all!!! i have one opel astra h 1.7 dtl 2006 year,The car has been without a battery for a year when I put it in the car, it did not start in diagnosis, I cannot communicate with ECM and in ABS and module, CIM gives me U2105 (there is no communication with ECM) I lIDOhZ.
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    • opel astra h starter problem