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Dash symbol car with spanner through

I have a Vauxhall Corsa 1.2 16V hatchback. 2day ago I noticed on the dashboard the light symbol car with spanner through it has come on solid and stays on all time when driving. The car runs perfectly no missfires or losz of power. I did a home diagnostics test on an Autel MS300 CAN OBD2 scanner and came on with one error which is P0170 fuel trim malfunction (bank 1). Please any ideas, many thanks, Tim.

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Your car only has one bank, so this code applies for the entire engine. I'll provide a link that gives a good breakdown of what P0170 means, possible causes, and possible corrections.
P0170 Fuel Trim Malfunction Bank 1

Posted on Aug 01, 2017

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Posted on Jan 02, 2017

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SOURCE: I have a Mercedes s500

Hi!!
What all this codes have in common is that every single one of them can be caused by a vacuum leak, so carefully check for cracked, loose or disconnected vacuum hoses, wiring to the coils, fuel pressure regulator, fuel injectors, specially on cylinder 2.

  • PO100 - Possible causes are wiring harness failure, air leak or defective hot film MAF sensor
  • PO130 - Vacuum leak
  • PO170 - PO173 - Possible causes are air ingress (leak), fuel injector failure, pressure regulator failure or mechanical wear of engine. Inspect and repair as necessary.
  • PO300 - possible causes are vacuum leak, wiring harness failure or ignition coil defective.
  • PO302 - If limit value for misfire "harmful to TWC" is exceeded, the MIL flashes immediately. If too many combustion misfires occur in one cylinder, the cylinder is switched off (cylinder selective fuel shut off). After the affected cylinders are shut off, the MIL changes from flashing to continuously lit until next time the engine is started. If combustion misfires are recognized, the fault code P0460 or P0462 is set if fuel tank level is too low (fuel reserve indicator light is on). Combustion misfires due to a shortage of fuel are recognized by means of this additional information.

NOTE:After cylinder cut-out system is turned off, the system monitors (through misfire detection) if all intake and exhaust valves are open again.
NOTE:Misfiring may be caused by many faults in the fuel injection system. Usually a misfiring fault is stored with faults pertaining to other components. An engine mechanical fault could also cause a misfire condition.
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Dec 03, 2010

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