Q: How do i diagnose a cylinder misfire in cylinders 3 and 6 on a 2004 ford taurus

asked by

Prentiss G

on January 22, 2018

I have a code (PO303 and PO306) saying that I have a misfire in cylinder 3 and 6. My car is burning gas really fast and I hear a strange clicking noise (the noise sounds as if its coming from the throttle body). The car runs very quiet but it doesn't pick up speed very fast and if I step on the accelerator a lot it sounds as if it is bogging out. I also have codes Po171 (bank 1 system too lean), Po174 (bank 2 system too lean), P2195 (oxygen sensor biased/ signal stuck bank 1 sensor1), P2196 (oxygen sensor signal biased/ stuck rich bank 1 sensor 1), P2197 (oxygen sensor signal biased/ stuck lean bank 2 sensor1), P2198 (oxygen sensor biased/ stuck rich bank 2 sensor 1), P0113 ( intake air temp. sensor 1 circuit high output.

My car has 145417 miles.
My car has an automatic transmission.

Save Big on Auto Repairs

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

Experienced Mechanic?

Earn up to $70/hr

Apply Now

What others are asking

Misfire on cylinder 4; error code P0304

The misfire is caused by one or more of several possible causes: the coil, a spark plug, an injector, wiring, compression in the cylinder, or the computer for the engine. Any one of these could be the culprit and diagnosis...

Key won't unlock car anymore

The latch inside the door is locked and unlocked by a lock actuator. The latch or lock actuator has likely bound up, and will need to be accessed get the door open. If this is the case, the inside door...

Car idles rough and worse when holding brake

A few components can cause the vibration in drive. The most common causes are bad engine mounts, low fuel pressure, or problems with the torque converter or transmission mounts. I recommend having a technician, such as one from YourMechanic, inspect...

The motor is sucking a lot of air from the plastic valve cover

The pcv valve may be stuck open or fell part inside causing excessive suction in the engine and high idles. Have the crankcase ventilation system checked for problems.

Gear takes a while to change from reverse to drive

Hello. You don't specify the mileage on your Focus, but the symptoms suggest low internal hydraulic pressure in the transmission (despite the recent fluid and filter change), or a weak forward clutch pack. If you would like to have this...

Car overheats and radiator fan will not come on

Hey there. This can be caused by a number of things such as low coolant levels (https://www.yourmechanic.com/services/top-off-coolant), a faulty thermostat (https://www.yourmechanic.com/services/thermostat-replacement), or a failing coolant fan switch (https://www.yourmechanic.com/services/thermo-coolant-fan-switch-replacement). As you may know, the coolant fan switch helps to maintain the...

My Volvo XC 60 went into low power saver mode and the battery was already low what does this mean?

It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns...

97 Ford F-150 4x4 shifting problem when wet

Hello, you have an electrical issue. The powertrain computer needs inputs to control the transmission shift points. The OSS(output speed sensor ) which reads in MPH on your speedometer. If a connector or wiring is directly exposed to water...

my 1995 lexus sc400 is having some issues. i just got it back from aamco for a rebuild on the transmission. when i got it back the speedometer will periodically stop working and will occasionally wiggle and shake. at highway speeds it will be erratic and flop around. the transmission shifts hard into overdrive and sometimes coming from a complete stop it feels like it’s bogging out and not wanting to go. it’s like it doesn’t know when to shift.

2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?

Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...

The Best Used Cars to Buy If You’re an Interior Designer

As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...

The Best Used Cars to Buy If You Love Camping

Do Do you love camping, getting back to nature and enjoying life in the great outdoors? If you do, then you know that getting there can be half the fun, and it’s even better if you have a great ride....

Q: How do i diagnose a cylinder misfire in cylinders 3 and 6 on a 2004 ford taurus

Get an instant quote for your car

Experienced Mechanic?

Earn up to $70/hr

What others are asking

Related articles

Browse other content