AutoCodes – Cadillac – P122A Cadillac

P122A Cadillac Code - Fuel Injector 3 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 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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: P122A Cadillac indicates Fuel Injector 3 Control Circuit Shorted.
Common causes: Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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.

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Code Popularity 399

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
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Code P122A 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 P122A Cadillac - Fuel Injector 3 Control Circuit Shorted - AutoCodes.com — P122A Cadillac Code - Fuel Injector 3 Control Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P122A Cadillac?

Faulty Fuel Injector 3
Fuel Injector 3 harness is open or shorted
Fuel Injector 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P122A 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 P122A 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.

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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 P122A Cadillac Code

1. What are the common symptoms of OBDII code P122A in a Cadillac related to Fuel Injector 3 Control Circuit Shorted?

- Common symptoms may include engine misfires, rough idling, loss of power, and potential stalling.

2. What could cause the Fuel Injector 3 Control Circuit to short in a Cadillac triggering code P122A?

- Possible causes include damaged wiring, a faulty fuel injector, a problem with the engine control module (ECM), or a poor connection.

3. How can I diagnose the Fuel Injector 3 Control Circuit Shorted issue in my Cadillac when code P122A appears?

- You can start by checking the wiring harness for any visible damage, testing the fuel injector's resistance, and scanning the ECM for any related fault codes.

4. Can I drive my Cadillac with OBDII code P122A (Fuel Injector 3 Control Circuit Shorted) present?

- It is not recommended to drive the vehicle with this code present as it can lead to poor engine performance and potential damage if left unresolved.

5. What are the repair options for fixing OBDII code P122A related to Fuel Injector 3 Control Circuit Shorted in a Cadillac?

- Repair options may include repairing or replacing damaged wiring, testing and replacing the faulty fuel injector, addressing ECM issues, and ensuring proper connections.

6. Are there any DIY tips for addressing OBDII code P122A in a Cadillac without professional help?

- DIY tips may include checking and cleaning electrical connections, inspecting wiring for damage, and conducting basic tests on the fuel injector.

7. How much does it typically cost to repair OBDII code P122A in a Cadillac caused by Fuel Injector 3 Control Circuit Shorted?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars at a dealership or repair shop.

8. Can a fuel system cleaner help resolve OBDII code P122A related to Fuel Injector 3 Control Circuit Shorted in a Cadillac?

- While a fuel system cleaner may help with general maintenance, it is unlikely to resolve the specific issue related to a shorted fuel injector control circuit.

9. Is it safe to reset the OBDII code P122A related to Fuel Injector 3 Control Circuit Shorted in a Cadillac using an OBDII scanner?

- Resetting the code may temporarily clear the warning light, but it is crucial to address the underlying issue to prevent further damage and ensure proper engine function.

10. How do I prevent OBDII code P122A from reoccurring in my Cadillac after repairing the Fuel Injector 3 Control Circuit Shorted problem?

- To prevent the code from reoccurring, it's essential to maintain regular vehicle maintenance, address any wiring or component issues promptly, and follow proper diagnostic procedures in the future.