P0212 OBD-II Trouble Code: Injector Circuit Malfunction - Cylinder 12

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

SCHEDULE P0212 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0212 code

P0212 is a diagnostic trouble code (DTC) for "Injector Circuit Malfunction - Cylinder 12". 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 P0212 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0212 code definition

Injector Circuit Malfunction - Cylinder 12

What the P212 code means

  • P0212 is telling us the Engine Control Module (ECM) has detected a fault within the cylinder 12 fuel injector circuit. This code is specifically set when either the voltage or resistance is found to be out of range.

  • This code is similar to and may be seen in conjunction with P0200 - P0211, which are all fuel injector codes.

  • Misfire, lean condition, and rich condition codes can be seen alongside injector issues.

What causes the P0212 code?

  • ECM is failing or has failed
  • Open or shorted wiring harness
  • Electrical connection that is broken or poor
  • Fuel injector cylinder 12 needs replacement

What are the symptoms of the P0212 code?

  • The Check Engine Light is observed on the dashboard after the fault is detected by the ECM

  • A failsafe mode, which is a precaution to prevent damage to the vehicle, is enacted by the ECM

  • Failsafe mode remains in effect until the circuit has performance that is within range or the fault is repaired

Symptoms that are felt just before the Check Engine Light is set include:

  • Car runs poorly
  • Engine struggles to run and dies
  • Car is hard to restart
  • Poor fuel milage
  • Lean, rich, or misfire conditions

How does a mechanic diagnose the P0212 code?

  • Checks the ECM for any codes that are stored and looks at the freeze frame data for each

  • Clears the codes and test drives the vehicle to verify the issues

If the issue is verified:

  • Uses the scan tool again to monitor operation of the injector circuit

  • Checks the voltage with a multimeter at the injector itself; a noid light may be used to check the pulse width.

If all else fails, the ECM will need to be tested to the manufacturer's specifications.

Common mistakes when diagnosing the P0212 code

Mistakes can be made when steps are not all followed or if steps are skipped entirely. Though the fuel injector is the most common cause, it and all other components must be tested before anything is replaced

How serious is the P0212 code?

P02012 can be rather serious depending on the symptoms. Things like a misfire or rich condition can be mild. On the other hand, symptoms can be rather serious, such as an engine that dies while running or is hard to start.

What repairs can fix the P0212 code?

Additional comments for consideration regarding the P0212 code

In some cases, a noid light may need to be used to check the voltage pulse width of the fuel injector. This is done to see the pulse coming from the ECM; the noid light will light up telling the technician if the injector is within specifications.

Professionals will use advanced scan tools that have the ability to view live data and changes in time that are very helpful, especially for intermittent issues.

Vehicles over 100k miles sometimes have an accumulation of varnish that is a buildup of particles in gasoline. Sometimes these can build up to the point where they clog injectors and other fuel components. Seafoam can be used to repair fuel injectors by unclogging them, in certain scenarios.

Need help with a P0212 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0212

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

SCHEDULE P0212 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

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...

Related questions

Q: Range Rover Sport v6 2.7 with fault code p2455 but the car does not have any sensor or circuit for the dpf.

Hi there. The DPF apparently was not installed in all markets, which may cause issues if the vehicle did not have it when manufactured, but is transported and sold into a market which does require it. I would check with...

Q: ABS, ESP, EBR malfunction

You're getting into an area that is kind of a dark art when you're getting these kinds of codes. While I don't know any of the symptoms that the car is exhibiting, I can tell you that failure in one...

Q: Good morning. My o2 sensor is out. I can't remember which one but when I schedule for someone to fix it, will they have the correc

Hi there. Did the gentleman at auto zone check for proper voltage going to the sensor? Proper return? Was a pin check performed at the engine computer to make sure that the computer was sending the signal? I would be...

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