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350matt
350matt, Engineer - BEng Hons
Category: Saab
Satisfied Customers: 20576
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
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Saab 9.5: P1312 Engine Code; P 1181 Engine Code 2006 Saab

Customer Question

P1312 Engine Code; P 1181 Engine Code 2006 Saab 9.5
Submitted: 1 year ago.
Category: Saab
Expert:  350matt replied 1 year ago.
Hello the P1312 code is an issue with the ignition system on cylinders 1 & 2 and probably requires a new DIC ( ignition coil cassette)especially if the car is misfiring or down on powerthe other fault P1181 is aair / fuel ratio too lean So check for exhaust leaks before the o2 sensor as if this has been experiencing an exhaust leak then it will have been running very rich as the sensor will see the extra air pulled in as fresh / lean fuelling and be adding fuel to compensate. this can lead to catalyst failure as the extra fuel can re-light inside and melt the catalyst The best way to find an exhaust leak is to run the engine from cold and feel around the exhaust joints with your bare hands - you'll have about 30 seconds before it all gets too hot and you should feel any escaping gas blowing over your fingers
Expert:  350matt replied 1 year ago.
Hi
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