AutoCodes – Cadillac – P1227 Cadillac

P1227 Cadillac Code - Fuel Injector 2 Control Circuit Shorted

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1227 Cadillac indicates Fuel Injector 2 Control Circuit Shorted.
Common causes: Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 496

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1227 Cadillac Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. The ECM energizes each fuel injector by grounding the control circuit of that fuel injector. The ECM monitors the status of the injector positive voltage control circuits and the fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the affected group of fuel injectors. The Diagnostic Trouble Code (DTC) will set when the ECM injector output driver detects an incorrect current on a fuel injector circuit.

OBDII Code P1227 Cadillac - Fuel Injector 2 Control Circuit Shorted - AutoCodes.com — P1227 Cadillac Code - Fuel Injector 2 Control Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P1227 Cadillac?

Faulty Fuel Injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1227 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1227 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1227 Cadillac code?

Need more information on how to fix the P1227 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1227 Cadillac code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1227 Cadillac Code

1. What does OBDII code P1227 mean on a Cadillac?

P1227 indicates that the fuel injector control circuit for cylinder 2 has a short, causing improper fuel delivery.

2. What are the symptoms of code P1227 in a Cadillac?

Symptoms include rough idling, engine misfires, reduced fuel efficiency, poor acceleration, and possibly an illuminated check engine light.

3. What causes the P1227 code on a Cadillac?

Common causes include damaged wiring or connectors, a faulty fuel injector, a shorted circuit, or a malfunctioning engine control module (ECM).

4. Can I drive my Cadillac with the P1227 code active?

Driving is not recommended, as continued operation may cause further engine damage or reduce performance significantly.

5. How do I diagnose code P1227 on my Cadillac?

Start by inspecting the wiring and connectors for cylinder 2's fuel injector, check the fuel injector for proper operation, and use a multimeter to test for circuit shorts.

6. How do I fix the P1227 code on a Cadillac?

Repairs may include replacing a faulty fuel injector, repairing or replacing damaged wiring, or, in rare cases, replacing the ECM.

7. How much does it cost to repair code P1227 on a Cadillac?

Repair costs vary but typically range from $150 to $400 for parts and labor, depending on whether the issue is a fuel injector or wiring-related.

8. What tools are needed to troubleshoot P1227 on a Cadillac?

You'll need an OBDII scanner, a multimeter for electrical testing, and possibly a repair manual specific to your Cadillac model.

9. Can a dirty fuel injector cause code P1227?

A dirty injector is unlikely to cause a short circuit, but it can cause performance issues. A short circuit is more likely due to electrical issues.

10. Will resetting the check engine light fix code P1227?

Resetting the light wonâ€™t fix the root cause. The underlying issue, such as a shorted circuit or damaged injector, must be addressed to resolve the code.