Po300

Asked by Apr 08, 2017 at 03:10 PM about the 2007 Chevrolet HHR Panel LT

Question type: Maintenance & Repair

I have a 2007 HHR 2.2 l it's throwing the code
po300 I replaced two spark plugs and on coil
because it was throwing the code for those
cylinders now it's throwing this one someone
please help me where is a good place to start

1 Answer

76,295

P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders...Possible causes; Faulty spark plug (s), Faulty ignition coil (s), Clogged or faulty fuel injector (s), Intake air leak, Fuel injectors harness is open or shorted, Fuel Injectors circuit poor electrical connection, Ignition coils harness is open or shorted, Ignition coils circuit poor electrical connection, Insufficient cylinders compression, Incorrect fuel pressure...The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem....https://youtu.be/QdWd68bVm30

Your Answer

Chevrolet HHR Experts

  • #1
    Tom Demyan
    Reputation
    1,060
  • #2
    Js08016
    Reputation
    550
  • #3
    butch686
    Reputation
    510
View All

Related Models For Sale

Used Chrysler PT Cruiser
92 listings starting at $2,999
Used Chevrolet Equinox
100 Great Deals out of 5,459 listings starting at $550
Used Chevrolet Impala
179 Great Deals out of 1,096 listings starting at $1,500
Used Chevrolet SSR
5 listings starting at $29,988
Used Chevrolet Silverado 1500
196 Great Deals out of 10,079 listings starting at $1,995
Used Chevrolet Malibu
126 Great Deals out of 1,864 listings starting at $850
Used Chevrolet Cobalt
26 Great Deals out of 285 listings starting at $1,500
Used Honda Accord
78 Great Deals out of 1,122 listings starting at $2,000
Used Ford Escape
185 Great Deals out of 5,150 listings starting at $1,995
Used Toyota Camry
110 Great Deals out of 2,251 listings starting at $1,599
Used Honda Civic
354 Great Deals out of 3,832 listings starting at $1,250

Used Cars For Sale

2011 Chevrolet HHR For Sale
11 listings starting at $3,990
2010 Chevrolet HHR For Sale
7 listings starting at $4,995
2009 Chevrolet HHR For Sale
13 listings starting at $4,700
2008 Chevrolet HHR For Sale
10 listings starting at $5,900
2007 Chevrolet HHR For Sale
3 Great Deals out of 12 listings starting at $2,980

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.