P122A 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 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.
Code P122A Description
What are the Possible Causes of the DTC P122A?
- 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?
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 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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Information for Specific Makes
- P122A Buick — Fuel Injector 3 Control Circuit Shorted
- P122A Cadillac — Fuel Injector 3 Control Circuit Shorted
- P122A Chevrolet — Fuel Injector 3 Control Circuit Shorted
- P122A GMC — Fuel Injector 3 Control Circuit Shorted
Frequently Asked Questions about P122A Code
1. What does the OBDII code P122A mean?
P122A indicates that the Engine Control Module (ECM) has detected a short circuit in the control circuit for fuel injector 3.
2. What are the common symptoms of P122A?
Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, misfires, and the Check Engine Light turning on.
3. What causes the P122A code to appear?
The code is typically caused by a short in the wiring for injector 3, a faulty fuel injector, a damaged ECM, or corroded or loose electrical connections.
4. Can I still drive my car with the P122A code?
Driving with this code is not recommended as it can lead to misfires, poor performance, and potential engine damage over time.
5. How do I diagnose the P122A code?
Inspect the wiring and connectors for injector 3, test the fuel injector with a multimeter, and check the ECM for faults or damage.
6. How do I fix the P122A code?
Repairs may include replacing a faulty fuel injector, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the ECM.
7. What tools are needed to fix P122A?
You’ll need an OBDII scanner, a digital multimeter, basic hand tools, and possibly a wiring diagram for your vehicle.
8. Can a bad fuel injector cause the P122A code?
Yes, a failing or internally shorted fuel injector can trigger the P122A code.
9. How much does it cost to repair the P122A code?
Repair costs vary but typically range from $150 to $500, depending on whether the issue is a wiring repair or a fuel injector replacement.
10. Can a corroded connector cause P122A?
Yes, corrosion in the electrical connector for fuel injector 3 can lead to a short circuit and trigger the P122A code.
Discuss the causes and fixes for P122A OBDII Code
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