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

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


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 $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE P0212 DIAGNOSTIC Get a fair and transparent estimate upfront

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
P0212
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0212 code.

SCHEDULE P0212 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


More related articles

P0782 OBD-II Trouble Code: 2-3 Shift Malfunction
P0782 code means the PCM has detected a problem with the 2-3 shift function often due too faulty solenoids or transmission failure.
P2501 OBD-II Trouble Code: Generator Lamp/L-Terminal Circuit High
P2501 means there is an issue with the generator lamp control circuit. This could be due to defects in the alternator, battery, or starter.
P0829 OBD-II Trouble Code: 5-6 Shift
P0829 means the vehicle isn't shifting between Gears 5 and 6 properly, possibly due to low transmission fluid or a damaged shift solenoid.

Related questions

P2101 TAC motor circuit range/performance
Hey there, thanks for writing in about your 2006 Nissan Altima. P2101 (https://www.yourmechanic.com/article/p2101-obd-ii-trouble-code-throttle-actuator-control-motor-circuit-range-performance-by-jay-safford) is an OBD-II generic code for the engine control module (ECM) detecting the throttle actuator control (TAC) went out of the range of the circuit causing an...
My car is leaking oil i got an oil change for it last month but it is still leaking oil what will cause my car to leak oil ?
Most older cars have oil leaks. Sealing technology has just not kept up with mechanical improvements to engines so much so that leaks often kill engines rather than mechanical problems. So, it is not unexpected at all to have an,...
I have a 2008 Honda Odyssey and 3 weeks ago my CEL came on and the van started vibrating while idling.
Hi there. Since the check engine light is coming on I would have to scan the computer for codes to see what is happening. It sounds like you may have an intermittent issue. Most of the time this is caused...

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