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 $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
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

4.5/5

Number of Reviews

3,696

Rating Summary
3,372
162
42
24
96
3,372
162
42
24
96

Scott

31 years of experience
30 reviews
Scott
31 years of experience
I must say I was pleasantly surprised. First off, Scott called to ask if he could come early for my appointment because he had finished his other job. So not only was he well-mannered but he was prompt. He took a thorough look at my truck and gave me his expert opinion. I felt like he was very honest and in no way was trying to take of advantage me. He explained everything in detail and the one thing that really made me happy was when he said "if it were my vehicle". He was very patient with me and answered all my questions. I've found an honest and trustworthy mechanic that I can use at anytime. Thanks Scott!
2009 CHEVROLET TRAVERSE - CHECK ENGINE LIGHT IS ON - PARKVILLE, MARYLAND

Grzegorz

38 years of experience
440 reviews
Grzegorz
38 years of experience
Gregg is a pro! Very honest about the problems with my car. After the holidays I wish he will back and fix what else is wrong with my car.
2006 MERCEDES-BENZ C230 - CHECK ENGINE LIGHT IS ON - SAN FRANCISCO, CALIFORNIA

Victor

32 years of experience
16 reviews
Victor
32 years of experience
Showed up on time and found problem after inspection and testing.
2004 FORD E-150 - CHECK ENGINE LIGHT IS ON - ALBUQUERQUE, NEW MEXICO

Chet

38 years of experience
393 reviews
Chet
38 years of experience
Chet was great! he arrived a little earlier then expected, but called and let me know. When he arrived he was very professional, but at the same time was friendly. While he was working on my car he actually talked to me and explained what he was doing. I was extremely satisfied with his service.
2006 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON - SAN DIEGO, CALIFORNIA

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...

Related questions

Q: Engine misfires and check engine light is always on

It’s always a good idea to pull over and turn off your vehicle when the check engine light is blinking. A blinking check engine light usually means there is a severe misfire in one or more of the cylinders. Most...

Q: Q: MAF sensor

jeff engstrom

Q: Computer Problem? 2014 Honda Civic

Hello - I would first go to an auto parts store and have them check for any problem codes (this is normally free), whether the Check Engine light is on or not. Depending on the results of the code scan,...

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