Q: Misfire on cylinder 1 causes spark too rich or lean fuel levels

asked by on October 16, 2016

P0301 computer detected a misfire on cylinder 1 causes spark too rich or lean fuel levels what does that mean.

My car has 180097 miles.
My car has an automatic transmission.

Hello there, the P0301 Cylinder 1 misfire is a common code on your 2002 Chevrolet Trailblazer. When a misfire code is seen it is telling us that the cylinder is not firing as it is supposed too. This means the engine runs erratically on that one cylinder or not at all. The engine tries to compensate for this cylinder not firing and can cause the engine to run rich, or lean. Common causes of a misfire are spark plugs, wires, coil, fuel pump, fuel injector, vacuum leak, cap and rotor. A qualified technician, such as one from YourMechanic, will be able to determine what is causing your cylinder 1 misfire and perform any repairs required to resolve the issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

My car rpm is going up and down and my speed meter is too. i have an Chevrolet 2012 cruze. what could it be?

What you are describing sounds like a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information...

Car making clicking noise

Hello, a noise under the hood is usually associated with something on the belt drive system. It could be one of the bearings starting to fail or the belt is noisy or coming apart. You should get this diagnosed so...

is it normal for an automatic 4 cylinder car to jerk or shudder going uphill?

This is not normal and you most likely have an engine misfire from a bad plug or ignition coil. Have the engine computer scanned to see what cylinder is misfiring and then you can isolate what cylinder is having the...

Related articles

P0293 OBD-II Trouble Code: Cylinder 11 Contribution/Balance Fault
P0293 P0293 Code Definition Cylinder 11 Contribution/Balance Fault What the P0293 code means The P0293 code indicates that the number eleven cylinder in your vehicle’s firing order is undergoing a fuel-related problem. Please note that P0293 is a generic code,...
P2425 OBD-II Trouble Code: Exhaust Gas Recirculation Cooling Valve Control Circuit Open
P2425 P2425 code definition Exhaust Gas Recirculation Cooling Valve Control Circuit Open What the P2425 code means P2425 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation cooling bypass valve (EGRCBV) control...
P0014 OBD-II Trouble Code: Camshaft Position B - Timing Over-Advanced or System Performance (Bank 1)
P0014 code definition Camshaft Position “B” - Timing Over-Advanced or System Performance (Bank 1) What the P0014 code means P0014 is the...