Codep300 multiple misfire on my 2000 saab 95 - Saab Cars & Trucks

P0171 : System Too Lean (Bank 1), P0300 : Random/Multiple Cylinder Misfire Detected, P0340 : Camshaft Position Sensor A - Bank1 Circuit Malfunction. I don't know what P1300 is.

OBD Error Code Details for P1340 is "Multiple Cylinder Misfire During Start. " and/ or P1340 - Camshaft Position Sensor 'B' Circuit Malfunction Check your spark plugs. Was any work done on them recently?

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I see no one else has posted an answer for you here yet so I will take a stab at it for you. The P1300 codes I am familiar with on the Saab's are P1334 and P1312 which almost always means the ignition cassette is failing. Most of the time the car will still run good, at least at first anyway getting worse over time. They are not cheap, ebay has the lowest prices and most availability that I know of. They are very easy to replace, just one electrical connector and four large torx screws right on top of the engine. If you have a black one replace it with black, red with red. To be absolutely sure you get the right one it's best to match part numbers. That being said most of the ones I have used have been interchangeable as long as they are the same color & # of cylinders.

Here is what I could find on it:

P1300 Random Misfire Detected. Catalyst Damaging.

Chances are that the Saab Ignition cassette is failing. You can find them on ebay, I recommend a new one since it is a common failure. Best to put new plugs in it while you are at it.


Easy to change, you just need a T-30 Torx (4 small bolts)
and one electrical connector on top of the engine. Oh and a good spark plug wrench.

P0300 Random/Multiple Cylinder Misfire Detected... sounds like di pack is the problem .. check plug to di pack for corrosion first .. but crank sensor can also be faulty ..

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...

P-1304 = Misfire at Cylinder #4.

MISFIRE COULD BE STOPPED UP FUEL FILTER.SLOW ACCELERATE PROBLEM COULD BE TURBO CHARGER PROBLEMS.

NO. replacement is the only option after it is verified by a qualified shop that it is indeed bad.