P0284 OBD-II Trouble Code: Cylinder 8 Contribution/Balance Fault

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0284 code

P0284 is a diagnostic trouble code (DTC) for "Cylinder 8 Contribution/Balance Fault". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0284 DIAGNOSTIC Get a fair and transparent estimate upfront

P0284 code definition

The P0284 code being stored indicates that your number eight cylinder is suffering from a problem related to fuel and, thus, can’t function properly.

What the P0284 code means

Your vehicle’s PCM keeps track of the power output generated by each cylinder. It does this by comparing the increase in speed – or acceleration – of the crankshaft of each cylinder during the power stroke.

When it senses that one or more of them is generating less power than the rest, the PCM stores a fault code P0284.

What causes the P0284 code?

Although there are a handful of possible causes that could be behind the P0284 code, they all have to do with the fuel injector. They are:

  • A plugged fuel injector in cylinder eight
  • A faulty fuel injector in cylinder eight
  • A dirty fuel injector in cylinder eight
  • A poor electrical connection in cylinder eight’s fuel injector circuit
  • The fuel injector harness of cylinder eight is shorted or open

What are the symptoms of the P0284 code?

When a P0284 code is stored, you should expect to notice at least one of the following symptoms associated with it:

How does a mechanic diagnose the P0284 code?

A mechanic would begin by inspecting the electrical connector on the fuel injector that belongs to cylinder eight. They’ll check the harness-side to see if any of the pins have been pushed out or if there is any corrosion. The injector will also have to be examined for bent pins. After that, they’ll also take a look at the wire that connects the fuel pump relay to the injector. With each new attempt, the mechanic will check to see if the code has cleared or if more work is needed to properly diagnose the cause.

Common mistakes when diagnosing the P0284 code

A fuel injector that is clogged – or even partially clogged – may also be responsible for this code. That’s why mechanics should perform an injector flush prior to continuing with replacing it as it may still be good after a cleaning.

How serious is the P0284 code?

Code P0284 is more of a nuisance than anything. That is, the problems associated with P0284 don’t necessarily mean your vehicle is unsafe to drive. You won’t lose control or be unable to brake because of them. However, your vehicle may also be a real challenge to drive and might begin making some irritating sounds. If it misfires, you could have some expensive repairs to face too. That’s why it’s still a good idea to play it safe and taking your vehicle to a qualified mechanic right away.

What repairs can fix the P0284 code?

Depending on what’s wrong that caused the code to be stored, any of the following steps could be necessary to clear it from the system.

Additional comments for consideration regarding the P0284 code

The P0284 code is a good reminder that regular maintenance is important for the functioning your vehicle. As you can tell from the above, a couple of the potential causes behind this code getting stored have to do with the fuel injector basically becoming too dirty to work properly.

Need help with a P0284 code?

If your vehicle is lacking because of P0284 problems or any other reason, let YourMechanic help get it back to 100%. We’ll send a certified mobile mechanic to your place of work or home where they’ll diagnose and repair it on the spot. Just call 1-800-701-6230 to speak with one of our service advisors or fill out a form to schedule an appointment. We’ll provide you with a free quote and get those repairs done ASAP.

Check Engine Light
trouble codes
p0284

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0284 code.

SCHEDULE P0284 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,295)

Rating Summary
5,825
224
52
35
159
5,825
224
52
35
159

JOHNNY

33 years of experience
96 reviews
JOHNNY
33 years of experience
BMW 325Ci - Check Engine Light is on - Sacramento, California
He was great explained everything to me and have now booked him for another appointment. Thanks johnny.

Ronald

41 years of experience
93 reviews
Ronald
41 years of experience
Mercedes-Benz C300 - Check Engine Light is on - Spring, Texas
Mister Ron was very nice and took time out to explain any concerns I might have about my car. He also made sure he communicated with me when he was on his way, once he was outside, and when we was done working on my car. I appreciate that considering I have a newborn that I had to look after.

Ronald

41 years of experience
93 reviews
Ronald
41 years of experience
Ram 1500 - Check Engine Light is on - Spring, Texas
Extremely satisfied with the service, he was able to come out and diagnose almost immediately. We purchased the parts, he came back installed them and been running great since. Would definitely recommend him and will not hesitate to call again if needed.

Scott

36 years of experience
802 reviews
Scott
36 years of experience
Dodge Neon - Check Engine Light is on - Tempe, Arizona
I truly enjoy Scott as he has done work for me in the past. Scott is very friendly, knowledgeable, and a true professional! I highly recommend him.


More related articles

P0623 OBD-II Trouble Code: Generator Lamp Control Circuit
P0623 means there is a voltage problem between the ECU and the generator control module due to bad battery or alternator, or a weak or dead battery.
P0217 OBD-II Trouble Code: Engine Overheat Condition
P0217 P0217 code definition Engine Overheating Condition What the P0217 code means The P0217 code means that the engine is or was overheating and should be turned off as soon as possible. Most engines have an engine coolant temperature...
P0030 OBD-II Trouble Code: HO2S Heater Control Circuit (Bank 1 Sensor 1)
P0030 Trouble code definition P0030 is the code for HO2S Heater Control Circuit (Bank 1 Sensor 1) What the P0030 code means...

Related questions

low engine pressure/chk engine light

Hello, and thank you for writing in. There are two separate "low pressure" warning lights on the vehicle, the low oil pressure warning and the low tire pressure warning. It is safe to assume for now that you are speaking...

I have gray smoke coming out of my tailpipe but it's not heavy smoke and my car check engine light is orange​ my car shut off

You did not mention why the radiator was replaced but I think your engine was overheated causing the head gasket to go bad. This would cause the white smoke out of the tail pipe and an engine misfire and overheating...

Engine fault reduced power

It sounds like you could have a sticking boost pressure actuator. Unfortunately, YourMechanic does not work on your model vehicle. I suggest having the dealership take a look at it.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com