P0612 OBD-II Trouble Code: Fuel Injector Control Module Relay Control

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0612 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0612 code

P0612 is a diagnostic trouble code (DTC) for "Fuel Injector Control Module Relay Control". 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 for $79.99. 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$79.99$20.00
Toyota$79.99$20.00
BMW$79.99$20.00
SCHEDULE P0612 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0612 code definition

The P0612 code represents that a problem has been detected within the relay control circuit of the fuel injector control module.

What the P0612 code means

The P0612 is usually triggered after the PCM detects that something isn’t working correctly with the fuel injector control module relay control circuit. One of the PCM’s supporting control modules may also detect this issue. Examples would be the body control module, the transmission control module, the instrument panel control module, the turbo control module, the fuel injection control module, the antilock brake control module, the cruise control module, the anti-theft module, proximity alert module, the traction control module, and the climate-control module.

In the event of a relay control error in the fuel injector control module, this code will be stored and a Check Engine Light will come on. However, for some models, this problem has to occur multiple times before the warning light is displayed.

What causes the P0612 code?

A number of issues could cause the P0612 code. The most common reasons would be:

  • A bad fuel injection relay/fuse
  • A malfunctioning fuel injector control module
  • A poor electrical connection
  • A loose control module strap or busted ground wire
  • Corroded, shorted or open connectors or wiring in the CAN Bus harness
  • A defective CAN bus

What are the symptoms of the P0612 code?

This code could produce a variety of symptoms. You will most likely notice some problems with drivability or difficulty shifting. Your vehicle’s engine may even stall on you or vibrate when you’re just sitting in idle. Poor acceleration is to be expected as well when something is wrong with a fuel injector.

Obviously, given the above, you will probably suffer from poor fuel economy until the problem gets fixed.

How does a mechanic diagnose the P0612 code?

Your mechanic will probably begin their diagnosis with an OBD-II scanner and a digital ohmmeter to ascertain all the codes stored in relation to this problem. Then they’ll carry out a visual inspection of every connection and wire.

It may also be necessary for them to disconnect and test every single one of the CAN bus pins, though this would take a lot of time.

Common mistakes when diagnosing the P0612 code

Codes like P0612 that have to do with communication failure are fairly easy to misdiagnose and, thus, perform an erroneous repair. One reason for this is that they’re so often accompanied by other problems.

In this case, P0612 is associated with some transmission and drivability codes, engine misfire codes, fuel injector codes, lead exhaust codes and many others. As a result, a mechanic may repair those issues and assume that the ones associated with the P0612 code.

Utilizing freeze frame data and addressing codes in the order in which they were stored will help a mechanic avoid this problem.

How serious is the P0612 code?

At the very least, as long as this code is present, your ability to drive your car is going to suffer. It’s not necessarily dangerous, but it could eventually evolve into something bigger and more expensive to fix. For instance, if you keep trying to force your vehicle to shift, it’s only going to be a matter of time before your gears become seriously damaged.

Of course, you’re also going to be wasting money at the pump because of the poor fuel economy related to this code.

What repairs can fix the P0612 code?

Your mechanic will carry out one or more of the following repairs:

Additional comments for consideration regarding the P0612 code

Keep in mind that taking out all the pins from the CAN bus would take a very long time and not be very cost-effective, so every step should be taken to not take this step if possible.

Need help with a P0612 code?

YourMechanic has certified mobile mechanics standing by to help the moment we hear from you. Feel free to call us at 1-800-701-6230 or fill out an online form to receive a quote regarding your required repairs and a mechanic sent out to your home or workplace.

trouble codes
Check Engine Light
P0612

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0612 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,255

Rating Summary
3,898
174
45
26
112
3,898
174
45
26
112
Ben

Ben

39 years of experience
1020 reviews
Ben
39 years of experience
Lexus LS430 - Check Engine Light is on - Houston, Texas
I was very pleased with the courtesy and work of Mr. Smith. He was exceptional in explaining and correcting the problem and thereby gained my trustI . I request he be my mechanic in all future service requests. I had a great experience working with Mr. Ben Smith.
Richard

Richard

19 years of experience
203 reviews
Richard
19 years of experience
Ram ProMaster 1500 - Check Engine Light is on - Bonita Springs, Florida
Prompt, polite and personal. Took the time to explain the process and his recommendations. 2 thumbs up
Michael

Michael

23 years of experience
37 reviews
Michael
23 years of experience
Ford F-150 - Check Engine Light is on - Federal Way, Washington
Very helpful and explained everything and what needs to be addressed. I feel informed and confident in Mike’s assessment and look forward to him performing services on my vehicle.
Rigoberto

Rigoberto

9 years of experience
650 reviews
Rigoberto
9 years of experience
Honda Civic - Check Engine Light is on - Chicago, Illinois
Rigoberto came on time & quickly diagnosed the problem- rats chewed thru wiring near the battery. He wasn’t able to fix it himself bc of parts, but gave me recommendations on where to go & how to not have the dealership sell me services that are not needed.

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...

Related questions

Q: Glow plug

Hi there. With newer diesel engines and the advanced timing systems they have, the importance of fully functional glow plugs once the motor is lit is less important. However, as the weather gets colder, starting a diesel engine with the...

Q: Engine malfunction light, reduced engine power, engine powered down

Hi there. There are a lot of things that can cause this on your 2012 BMW M5. I usually start by scanning the computer for codes to see what comes up. If there are not codes then I load test...

Q: Car cranks over but won't start - 2004 Nissan Sentra

If the fuel pump is not "whirring" momentarily when you turn the key "on", either the pump is not receiving power or it's non-functional. You might try probing the fuel pump harness for 12 volts at moment key is turned...

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.

1-800-701-6230 · hi@yourmechanic.com