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Hi
Working on a 1.8 16V petrol DOHC VVT Opel/Vauxhall Vectra – 2006.
Car works fine with no apparent misfiring and no loss of power.
No engine or spanner light.
Has P0170 stored. Reappears after deletion.
On this car: P0170 = “fuel trim malfunction bank 1”.
General code that can mean almost everything – so I have read.
– MAF
– pre-cat oxygen sensor
– vacuum leak
– fuel pressure
– faulty thermostat
– more curious (overfilling of oil)
– EVAP related (something with under/over pressure in fuel tank and evap solenoid)I don’t suspect MAF og pre-cat oxygen. No apparent vacuum leak. Has good fuel pressure and all injectors work fine. Temp steady around 92 celcius.
I do not have access to live data.
While driving the car with the windows down I heard rattling when passing speed bumps. Blocked the tail pipe and found a pretty obvious leak in the tail pipe, but well after the cat end the flexible part.
Could this result in a P0170??? Thiis should not affect the post-cat oxygen sensor and there is no oxygen sensor code. Only thing could be that the engine does not get the right amount of back pressure/resistance…?
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[quote=”college man” post=62961]I would search for vacuum leaks and clean the MAF to start.
http://www.youtube.com/watch?v=sAKwCzUE_9M%5B/quote%5D
+1. After that I would I would suspect O2 sensor. Good luck
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