Question about 1999 Saab 9-5

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Saab 95, 2001. Got error code p1266 which is a bad earth on injector, but I have been told p1266 doesn't exsist. If said code does exsist how do I fix the earthing problem.

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The code does exist. It is for a short on injector number six. You either have some bad wiring somewhere between the injector and the computer or a bad injector or possibly a faulty computer, I would carefully visually inspect the wiring from the injector to the computer and if that checked out ok then I would replace the injector. After repair clear the code with a scan tool and see if the code comes back. If it comes back after all that then consider replacing the computer. Tracing short are never fun but a little patience and it can be found. Good Luck!

Posted on Mar 20, 2011

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My check light had been on since i left colorado and when i got home i found that it was a vacuum hose not connected to the throttle valve,put it back on went and had it checked out with tech2 no known code went trough inspection after getting the check engine light out.every thing was fine until i pulled the ac fuse from the car and again the check engine light came on.well i'm thinking that the smallest change in anything with the saab will trigger the engine check light to come on.again i have to check all my vacuum lines and get back to you on this.but the car is worth the effort.the tech2 didn't come up with the code but i'm sure it was the vacuum that did it.

Posted on Oct 11, 2011

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1 Answer

I have a Saab with a service code P0304 I looked into it usually bad ignition coil...I replaced the coil but No go, any ideas?


P0304 code means - Cylinder 4 Misfire detected.

Possible causes are:

- Faulty spark plug 4
- Clogged or faulty fuel injector 4
- Faulty ignition coil 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak

Jul 24, 2015 | Saab Cars & Trucks

1 Answer

I changed the fuel pump on my 2005 saab 93 it still wont start


A common problem is a bad crank sensor on a 9-5 2.0t and 2.3t! if is bad, it doesn t send signal to the ECM, then the ECM do not send power to the pump relay! it is always better check fault code first

Sep 26, 2014 | 2004 Saab 9-3

1 Answer

Code p0203


P0203 - Cylinder 3 Injector Circuit Malfunction

P0203
means that the PCM detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled "low" or close to zero. When the injector is switched off, the PCM expects to see a voltage that is close to battery voltage or "high". If it doesn't see the expected voltage the PCM will set this code. The PCM also monitors resitance in the circuit. If the resistance is excessively low or high it will set this code.

The symptoms for this code will likely be a misfire and a rough running engine. Poor acceleration. The MIL will also be illuminated.

The causes of a P0203 engine light code could be any of the following:
Bad injector. This is usually the cause of this code but doesn't rule out the possibility of one of the other causes
Open in the wiring to the injector
Short in the wiring to the injector
Bad PCM

Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa.
Jose.

Oct 23, 2011 | 2001 Dodge Ram 2500 Truck

2 Answers

2000 saab 9-5 missing really bad starts well just missing code that was read is P0300 please any help?


Hi there,

A P0300 diagnostic code indicates a "random" or "multiple" misfire.


Unfortunately, P0300 doesn't tell you specifically which cylinders are mis-firing, nor why (code P0301 would indicate cylinder #1; P0302 would indicate cylinder # 2 etc). This means there could be an issue with any number of components/circuits relating to the ignition/combustion circuits.


I would recommend you check for the following:

  • Faulty spark plugs and/or HT leads
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor

Sometimes the underlying cause of a random misfire is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold, unmetered air getting past the airflow sensor, or even an EGR valve which is stuck open.



Hope this helps...




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1 Answer

My "Check Engine Light" has gone on periodically


From what you are describing i feel you might be having an bad EGR valve..It only causes the rough idle and shaking and fuel smell in exhaust..It can also cause back firing. Does it happen? Also do you hear any popping noise from exhaust?

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2 Answers

Cabin blower runs constantly, even if car is off. 1999 saab 9-3 se


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1 Answer

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