Rick's Free Auto Repair Advice

Posts Tagged: P0300

Check engine light on, rough engine

Fix for rough engine and check engine light GM service bulletin #12-06-01-001 for Service Engine Soon Light On and Rough Running Engine GM has issued a service bulletin #12-06-01-001 to address a check engine light on (service engine soon light on), a P0300 trouble code and a rough running engine on the vehicles listed below. GM has determined that he rough running engine is caused by cracked or oil fouled spark plugs, usually on cylinders #1 and #7. Vehicles affected 2007-2011 Chevrolet Avalanche, Express, Silverado 1500, Suburban, Tahoe 2007-2011 GMC … Read More

P0300 random misfires

Diagnose P0300 random misfires If you own a GM vehicle and encounter a check engine light and P0300 random misfires code, read this service bulletin #PIP5264 before replacing any parts. The bulletin applies to the vehicles listed below: 2004-2011 Cadillac STS 2004-2015 Cadillac CTS SRX 2013-2015 Cadillac ATS XTS 2005-2015 Buick Lacrosse Allure (Canada only) 2008-2015 Buick Enclave 2010-2015 Chevrolet Camaro 2011-2015 Chevrolet Captiva Sport 2015 Chevrolet Colorado 2008-2015 Chevrolet Equinox 2012-2015 Chevrolet Impala 2008-2012 Chevrolet Malibu 2009-2015 Chevrolet Traverse 2007-2015 GMC Acadia 2015 GMC Canyon 2010-2015 GMC Terrain 2007-2009 … Read More

P0171, P0300, P1174

How to fix codes P0171, P0300, P1174 GM has issued a technical service bulletin # 08-06-04-001B to address trouble codes P0171, P0300, P1174 on the following vehicles: 2006-2007 Chevrolet Cobalt, HHR 2006 Pontiac Pursuit (Canada) 2007 Pontiac G5, G6 2006-2007 Saturn ION with 2.4L Engine (VIN B, P – RPO LE5) P0171 System too Lean (Bank 1) P0300 Random/Multiple Cylinder Misfire Detected P1174 Fuel Trim Cylinder Imbalance The most common cause for these types of trouble codes are vacuum leaks or plugged injectors that deliver too little fuel and cause … Read More

Chevy Silverado misfire

Fix Chevy Silverado misfire Some Chevy Silverado owners with the 4.8L may encounter an intermittent P0300 misfire trouble code, along with excessive emissions, poor idle quality, hesitation, and stalling. You would normally start by checking your Chevy Silverado fuel trim with a scan tool. But several shops report problems with an intermittent and corroded ground connection that can cause all these problems on the 4.8L engine. The misfire condition may appear during turns or any time the engine moves in it’s mounts. So before checking all the usual suspect like … Read More

Toyota Misfire

Toyota Camry Misfire and hesitation. Check engine light on If you experience a Toyota misfire misfire on a Camry you may be looking at a binding variable valve timing actuator (VVT). The VVT actuator is driven by oil pressure to retard or advance timing. The PCM uses input from multiple sensor to determine engine load and commands oil pressure to the advance or retard side of the actuator. Use the wrong oil viscosity can affect how the VVT responds to PCM commands. If the engine experiences sludge buildup, that can … Read More

Misfires on GM vehicles

Fix codes P0300 P0301 P0304 Misfire on cylinder 1 on left turns, misfire on cylinder 4 on right turns on GM vehicles GM has issued a technical service bulletin (TSB) PIP3333A to address Misfires on GM vehicles problems with the cylinder misfires on certain cylinders. The problem can occur on cylinder #1 on left turns, and cylinder #4 on right turns. The bulletin applies to the following vehicles: 2004-2008 Chevrolet Aveo 2004-2006 Chevrolet Cavalier 2005-2008 Chevrolet Cobalt, Cobalt SS 2006-2008 Chevrolet HHR 2004-2008 Chevrolet Malibu 2007-2008 Pontiac G5 2006-2008 Pontiac … Read More

Rough idle P0171 P0300 P1174

Fix rough idle P0171 P0300 P1174 Engine runs rough, P0171, P0300, P1174 on Saturn Ion GM has issued a technical service bulletin (TSB) 08-06-04-001 to address engine Rough idle P0171 P0300 P1174 problems on 2006-07 Chevrolet Cobalt and HHR, 2007 Pontiac G5 and G6, and 2006-07 Saturn Ion with the 2.4L engine. The engines in these vehicle may experience injector clogging that results in rough operation and trouble codes P0171, P0300, P1174. GM advises that if one injector is plugged, you must replace all injectors with an updated version (Part 12602480) … Read More

Diagnose misfires

Diagnose misfires If you own a vehicle with coil packs and spark plug wires or a coil-in-plug setup, you may see these misfire codes. This post will help you diagnose misfires. Diagnose misfires — is it the spark plug or the ignition coil? Whether your engine is equipped with coil packs and spark plug wires or coil-on-plugs, always diagnose misfires by checking the spark plugs. Why? Because a worn or damaged plug can degrade your spark plug wires and even damage the ignition coil. If you replace the wires or … Read More

Engine Runs Rough

Engine Runs Rough If you find any of these trouble codes P0300, P0301, P0302, P0303, P0304, P0305, P0306, read this. Here’s how to diagnose engine runs rough after going through a puddle on any of these vehicles: 2008-2009 Chevrolet Colorado, TrailBlazer, 2008-2009 GMC Canyon, Envoy, 2008-2009 HUMMER H3, H3T, 2008-2009 Saab 9-7X, All Equipped With Engine RPOs LLR, LLV, LL8, here’s what to check out. The ignition coil bolts on these vehicles is vented. If you drive through puddles and water splashes onto the bolt vent holes, the water will … Read More

P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312

Fix code P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312 Pinpointing cylinder misfire codes People ask me about misfire codes after they’ve replaced all the spark plug wires, coil, and plugs and they still have the code. Here’s a quick explanation of how a pro would attack the problem. First, if you’re getting a P0300 Random/Multiple Cylinder Misfire Detected code, that would indicate a universal problem that applies to all cylinders. In that case, start by checking fuel supply issues like poor fuel pressure caused … Read More

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