Question about 1997 Buick Century

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Buick Century 1997

Code PO301 with consistent Service engine soon lighted.... non specific code ..random cylinder 1 misfire... Mechanic thinks it needs a valve job... other possibilities??? Can't pass inspection and time is running out

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Replace spark plugs and wires. If thats not it, its your intake gasket. Mine did the same thing. I am working on putting my third intake gasket in my buick. 137740 miles

Posted on Aug 17, 2008

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What are the probable causes of DTCs P0300, P0301, an P1189?


P1189 Buick - Engine Oil Pressure Switch Fault PO301
Possible causes
- Faulty spark plug 1
- Clogged or faulty fuel injector 1
- Faulty ignition coil 1
- Fuel injector 1 harness is open or shorted
- Fuel injector 1 circuit poor electrical connection
- Ignition coil 1 harness is open or shorted
- Ignition coil 1 circuit poor electrical connection
- Insufficient cylinder 1 compression
- Incorrect fuel pressure
- Intake air leak
PO300 is just telling you that you had a misfire.


Apr 18, 2015 | 2003 Buick Century

1 Answer

Why does my 1998 Buick Century cutting out or skipping when driving and makes the engine light flash


Misfiring. Have the codes read. Code number p0301 is number 1 cylinder. p0304 would be number 4 cylinder and so on.

Jan 14, 2015 | 1998 Buick Century

1 Answer

2001 buick century P0304 step on gas engine light starts flashing


P0304 is engine misfire #4 cylinder Several things can cause a misfire #1 electrical which you have covered #2 Mechanical Test engine compression is should be around 150 cranking and 120 running . internal valve train components can cause bad compression and the valves then self. #3 fuel injector can be the cause suggest swapping with a know good cylinder and see if misfire follows injector.

Aug 19, 2014 | 2001 Buick Century

1 Answer

PO440


http://www.obd-codes.com/p0442
P0440 indicates the failure of the EVAP system to develop proper vacuum. If you got
and replaced a proper good quality gas cap, you have corrected the most common cause.
However, in fully searching the causes of this code (http://engine-codes.com/p0440_chevrolet.html ) (pardon the generic GM info, but will apply for you)-----you will find there are 5 other causes of the vacuum failure, which are independent of the gas cap. Your good local mechanic can sort those out; I would save your gas cap
receipt if you were advised to buy one not needed. As you probably know, your
State emission test facility checks your gas cap----so that is another way to find that specific portion of this answer,
(for their fee).
P0300 is a generic misfire code. For this, a specific Cadillac forum may be most
helpful = 2001 Deville intermittent service engine soon light code P0300
co-logo-100x100.png 2001 Deville intermittent service engine soon light code... I recently bought this car from an owner who took decent care of it but a week after i bought it, the service engine light appeared. After a few View on www.cadillacforums... Preview by Yahoo You will see that this generic code is perhaps more serious, costly, and harder
to track down than the P0440. You will also discover that P0301 is cylinder 1 misfire, P0302 is cylinder 2, and etc, etc. If you get a good diagnostic, they will generally
be able to localize the problem fairly specifically---and get a more specific fix. The person who reported this code was unhappy because he was given several ($$) fixes,
before he got one that erased the code, and was a solution. (Be forewarned ----A generic misfire can have umpteen issues--or one! !; use your own local preferred method for solving this with a mechanic who gives you good service, and stands behind what they do.)
2001 Deville intermittent service engine soon light code P0300

Jun 04, 2014 | 2001 Cadillac DeVille

1 Answer

P1300


Error Code: P0301
Description:
Cylinder 1 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P1300
Description: Random Misfire

Possible Cause:
As above.

Jan 22, 2014 | 1996 Honda Civic

1 Answer

2003 trailblazer service engine soon light .code po301 number 1 cylinder misfire,code po014 cam phase eeror


you may need to replace the cam and crank sensor at the same time.some vehicles use these two together to communicate with the computer.

Mar 19, 2013 | 2003 Chevrolet TrailBlazer

3 Answers

CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M


P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Jan 17, 2011 | 2002 Mercury Sable

1 Answer

WHAT IS THE CAUSE OF THE PO301 CODE?


The error code p0301 ,This code is related to misfire.The cylinder is misfiring. p0301 this is the indication of cylinder number 1 ,that is misfiring.If the code comes up as p0300 this is the indication of random misfire from all the cylinders.But in your case its indicating p0301 this is indication of cylinder 1 misfire.Check cylinder 1 and replace the faulty cylinder 1 to clear the fault.The spark plugs and the wires connecting to spark plugs also needs to be checked. Keep updated with any more query.Thanks.

Oct 12, 2010 | 2003 Mitsubishi Lancer

1 Answer

My check engine light started blinking andthe vehicle is shaking


a blinking ck engine light means you have a catalyst damaging misfire. the misfire is also the cause of the shaking and probably low power condition. you need to have the vehicle scanned asap and try to figure out which cylinder or cylinders are misfiring by the code read by the scanner. if you have a po300 code it means you have a random cylinder misfire. if you have a po301 through a po306 then go to the cylinder 1-6 designated by the last # in the code to figure the cause from there. look for a burnt plug wire, remove the proper sparkplug and ck it. also remember to change the engine oil as there is unburned fuel getting into it every minute this condition exists that the engine is running. good luck to you.

Sep 23, 2010 | 2001 Chevrolet Blazer

1 Answer

My 1999 Buick Century Custom began to shake when i turned it on, it seemed to stop or i didnt notice it as much when I picked up speed, but when i slow to take corners or back up it shakes. The service...


Okay, this sounds like its misfiring, the engine light is on because the computer sees a problem, if you have the computer scanned it will tell you where the problem is, for example it will give a code and say cylinder 2 misfire.autozone will scan for free, if its a misfire i would start with a tune up , spark plugs ,sparkplug wires and air and fuel as needed, then see how it drives from there, the light can be cleared at autozone also, if it still picks up a misfire then depending on the cylinder you may have a bad coil pack also, there are three packs one controls two cylinders so depending on the cyliner misfiring thats the coil to replace, they should be labeled but if not just follow the wire to coil from cylinder, they are as follows, rear cylinders from left to right are cylinders 135 the front 246, hope this helps.

Aug 29, 2010 | 1999 Buick Century

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