P2311 OBD-II Trouble Code: Ignition Coil D Secondary Circuit

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2311 code

P2311 is a diagnostic trouble code (DTC) for "Ignition Coil D Secondary Circuit". 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 P2311 DIAGNOSTIC Get a fair and transparent estimate upfront

P2311 code definition

Ignition Coil D Secondary Circuit

What the P2311 code means

P2311 is an OBD-II generic code for the engine control module (ECM) detecting ignition that coil D or the cylinder 4 secondary circuit has low ionization. This means the coils spark is not lasting long enough.

What causes the P2311 code?

  • The spark plug coil secondary circuit (to include the coil, coil boot or the spark plug) is shorted or open causing excessive resistance in the coil secondary circuit.

  • The coil primary has internal shorted windings and causes the secondary voltage to be low.

  • The primary return wiring is shorted to ground or cut in the harness back to the ECM.

What are the symptoms of the P2311 code?

  • The Check Engine Light will be illuminated and code P2311 set in ECM memory as a fault

  • The engine will run rough or misfire

  • The engine may run pretty good and then all of a sudden run very rough when the short occurs

  • The engine may only misfire under a load when the secondary voltage needs to be at its highest

How does a mechanic diagnose the P2311 code?

  • Scans for codes in the ECM and documents them then looks at the freeze frame data for failure

  • Checks the coil for carbon tracking, cracks or the wiring harness having been cut into causing the short

  • Checks the coil output with a spark checker

  • Removes the coil connection and tests the coil for shorted primary windings

  • Checks the wiring harness for shorts or open circuits from coil to the ECM

  • Checks the spark plug for cracks or a worn electrode

Common mistakes when diagnosing the P2311 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired.

  • Trying to test the coil without a spark tester. This may burn out the ECM coil driver if a proper tool is not used.

How serious is the P2311 code?

  • Code P2311 is a code indicating that the coil secondary spark is not good enough. This may be due to the plugs being worn or cracked.This can also be due to spark grounding inside the head through the plug boot or the coil itself.

What repairs can fix the P2311 code?

Additional comments for consideration regarding the P2311 code

Code P2311 is caused most commonly from an internal coil primary circuit short or open windings. The failure may burn out the ECM coil driver. If the coil and ECM are not replaced at the same time, the ECM may get burned; it should be replaced with a new coil. Always check the coil primary and secondary resistance for problems if replacing the ECM. It is also recommended to replace the spark plug boot and plug.

Need help with a P2311 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
P2311

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2311 code.

SCHEDULE P2311 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.


Related questions

New codes after fixing previous problem
Hi there, thanks for writing in. Code P2311 (https://www.yourmechanic.com/article/p2311-obd-ii-trouble-code-ignition-coil-d-secondary-circuit-by-jay-safford) points out a problem with the ignition of cylinder #4. The spark is most likely not lasting long enough. There may be another issue going on with the vehicle. I'd recommend...

More related articles

P2729 OBD-II Trouble Code: Pressure Control Solenoid E Control Circuit Low
P2729 means a solenoid has malfunctioned due to a failing transmission, faulty sensors or solenoids, low fluid levels or electrical issues
P0859 OBD-II Trouble Code: Traction Control Input Signal High
PO859 means that the PCM has reported a malfunction relating to the traction control input signal circuit due to a faulty control switch or sensor.
B1203 OBD-II Trouble Code: Fuel Sender Circuit Short To Battery
B1203 means a circuit in the fuel tank sender has shorted. This is likely caused by a faulty wire, or the fuel tank sender could be defective.

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