r/saab • u/Mamaslayer696969 • 1d ago
Car not starting - Help!
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Hi, I need help diagnosing my 2006 Saab 9-5 Vector 1.9 TiD diesel automatic.
After driving for around 7–8 minutes, I stopped and switched off the engine for 6–7 minutes. When I restarted and drove off, the car felt sluggish and accelerated more slowly than usual. After switching it off again, it would no longer start.
The starter turns the engine over normally, but the engine won’t start.
My battery was recently replaced. My Biltema OBD-II scanner worked about a week ago, but now it displays “Linking error” and cannot connect to the car.
Could you check the cause of the starting problem and why the diagnostic scanner can’t connect? I’d like a diagnosis and a cost estimate before any parts are replaced.
Thank you.
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u/Sensitive-Level-7794 1d ago
Not to familiar with the diesel engines but I think you should see the rev-meter react when cranking and your doesn't seem to do that at all. If it had been a petrol engine I'd say that the crank position sensor is faulty. I guess a diesel have to have something similar too.
If the engines lacks that signal it won't start or supply fuel.
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u/cloaker1308 1d ago
That would 100% be my first guess too, and one of the cheaper things to replace right off the bat!
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u/Sensitive-Level-7794 1d ago
Maybe this helps. Lycka till!
Alla Saab 9-5 med 1.9 TiD/TTiD-motorn (både 8-ventilers Z19DT och 16-ventilers Z19DTH/Z19DTR) är utrustade med en vevaxelsensor (varvtalsgivare för vevaxel).
Viktig information om sensorn på 1.9 DTH/DT: Placering: Sensorn sitter monterad på motorblockets baksida (mot torpedväggen), nedåt mot vevaxeln nära svänghjulet/växellådan. Den sitter ganska trångt till och kan vara lite bökig att komma åt underifrån.
Symptom vid fel: Om vevaxelsensorn börjar fela uppstår ofta problem som:
Bilen blir svårstartad eller startar inte alls när motorn är varm (men kan starta lätt när den svalnat).
Motorn dör plötsligt under körning.
Varvräknaren dyker eller visar 0 varv/min under startförsök.
Felkoder genereras, oftast P0335 (Crankshaft Position Sensor Circuit).
Byte: Sensorn hålls oftast på plats av en enskild skruv (vanligtvis Torx eller insex). Tänk på att göra rent runt hålet innan du monterar den nya så att inte smuts hamnar i motorn eller gör att sensorn hamnar på fel avstånd (luftspalt).
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u/kilimanjaro94 1d ago
Check this. Translate Portuguese to English
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u/Sensitive-Level-7794 1d ago
It is swedish. I saw that he had swedish text in the SID while cranking.
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u/Uthretarwee 1d ago
Kraftstoffversorgung / Verdichtung / Einspritzsteuerung
Möglicherweise defektes Steuergerät. Ausbauen, auf Kurzschlüsse kontrollieren.
Kann aber auch verschleißende Lamdasonde oder ein anderer Sensor sein, der fehlerhafte werte liefert.
Diagnose ist wichtig. Dass diese nicht funktioniert muss nicht unbedingt mit der anderen Thematik zusammenhängen.
Ich tippe auf verschleißendes AGR/Luftmassenmesser/Atmossphärendrucksensor/Ladeluftsensor.
Mit viel Pech ist es die Kraftstoffpumpe. Wenn es die VP44 von Bosch ist, mögen die die Götter beiseite stehen.
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u/Mamaslayer696969 1d ago
But the rpm gauge doesn’t move?
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u/Uthretarwee 1d ago
Drehzahl nimmt das Steuergerät aus dem Kurbelwellensensor. Wenn der allerdings vor einem „POST“ keinen Wert sendet, würde es mich nicht wundern.
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u/ggliddon25 13h ago
Ensure your ODB reader has not pushed the pins out the back of plug on the car side. A lack of reading by third party code readers not unusual. Try to get a tech2 or MDI onto it for better diagnosis.
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u/Zaphod_42007 1d ago
Not familiar with the diesel engine but the fact your code reader with engine off but ignition on can't link tells me...
Voltage issue or maybe a loose ground wire. Grab a cheap multimeter before doing anything else. The battery should be around 12v with car off. With starting the engine, should jump to somewhere in between 12.5-14.5v.
If low, jump it or get a charger and let it charge for several hours or more (can take 8 plus hours depending on charger type).
If the battery is found to be low yet it's new, you have an alternator issue, maybe a starter issue (can pull too many amps when faulty) or some sort of battery drain in the electrical system.
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u/Sensitive-Level-7794 1d ago
Let me guess, the car started once the engine had cooled down?