Check Engine Light is on and the code is P0303

Question 1

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2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack

Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 • 2008 Cadillac Cts

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Codes p0171 p0303 p0325 car missing

p0171 = fuel system too lean, this means vacuum leak or faulty oxygen sensor

p0303 = cylinder 3 misfire

p0325 = knock sensor malfunction.

p0303 and p0325 - i can see these working together, if a cylinder misfires, it will cause the knock sensor to trip. I would lean towards the coil and or ignition module, along with a faulty oxygen sensor.

Dec 08, 2013 • 2000 Nissan Altima

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04 saturn L300

Next time the engine light comes on, get the codes pulled and get back to me

Apr 15, 2013 • Cars & Trucks

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Out of nowhere, my 2004 nissan altima bucked.. then stalled after a 3 hour drive on the expressway. after letting my car sit for a about 10 minutes, i turned it back on, successful.. or so i thought, as i...

any check engine lights comeing on it sounds like a intermiting problem that will eventually give the car a tune up plug wires have the injectors cleaned

Nov 29, 2010 • 2005 Nissan Altima

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When I drive and get up to 50 miles per hour my engine light comes on and when I slow down to a stop and start up again the engine feels like it's bogging down. Two error codes light up on my dash: Check...

What are the fault codes you read.

Jun 09, 2017 • 2007 Suzuki XL-7

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3answers

1999 jeep cherokee 6 cylinder engine light

1.Plugs
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure.
Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
Hope this helps.
Thank you,
Lee

Dec 12, 2009 • 1999 Jeep Grand Cherokee

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Our 2005 Mazda Tribute goes dead when applying the brakes to exit after driving on the expressway for a couple of hours about 65-70 miles per hour. We have put a new throtle control valve in it. That...

check the enersher switch (used as a safty shot off in the event of an accedent) its mounted iline of the fuel system try tracing from the tank

Oct 07, 2009 • 2005 Mazda Tribute

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3answers

Check Engine P0303 Code. Stays solid then blinks.

ok a P0303 Cylinder 3 Misfire Detected is a hard code meaning your problem is not intermetent,if you all ready changed the spark plugs and wires,the next step is to check the injector for the #3 cylinder,also if you can try using another ignition coil,check the crank position sensor and last try moving the plugs aroud to see if the code changes or if you get a new one,i dont think you will be stranded but the engine performance is crapy.

Sep 09, 2009 • 2001 Dodge Caravan

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My check engine light has been on since I put the new motor in a few months back. Been replacing parts to fix problem, now that I took a trip and drove the truck for 8 straigt hours it's now idling rough...

what is the code stored?

Jul 19, 2009 • 1997 Ford F150 Regular Cab

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2answers