AutoCodes – Ford – P120B Ford

P120B Ford Code - Secondary Fuel Injector Bank 1 Excessive Flow

Quick Answer

The Powertrain Control Module (PCM) monitors the Secondary Fuel Injector Bank 1. Common causes include Faulty Secondary Fuel Injector Bank 1, Secondary Fuel Injector Bank 1 harness is open or shorted, Secondary Fuel Injector Bank 1 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: P120B Ford indicates Secondary Fuel Injector Bank 1 Excessive Flow .
Common causes: Common causes include Faulty Secondary Fuel Injector Bank 1, Secondary Fuel Injector Bank 1 harness is open or shorted, Secondary Fuel Injector Bank 1 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 1,601

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 Sep 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P120B Ford Description

The Powertrain Control Module (PCM) monitors the Secondary Fuel Injector Bank 1. The PCM sets the OBDII code when the Secondary Fuel Injector Bank 1 is not to factory specifications.

OBDII Code P120B Ford - Secondary Fuel Injector Bank 1 Excessive Flow - AutoCodes.com — P120B Ford Code - Secondary Fuel Injector Bank 1 Excessive Flow

What does this mean?

What are the Possible Causes of the DTC P120B Ford?

Faulty Secondary Fuel Injector Bank 1
Secondary Fuel Injector Bank 1 harness is open or shorted
Secondary Fuel Injector Bank 1 circuit poor electrical connection

How to Fix the DTC P120B Ford?

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 P120B Ford 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 P120B Ford code?

Need more information on how to fix the P120B Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P120B Ford 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 P120B Ford Code

1. What are the common symptoms of OBDII code P120B Ford (Secondary Fuel Injector Bank 1 Excessive Flow)?

Symptoms may include rough idling, decreased fuel efficiency, engine misfires, and a noticeable decrease in engine performance.

2. What are the possible causes of OBDII code P120B Ford?

Potential causes may include a faulty fuel injector, a clogged fuel injector, wiring issues, or a problem with the fuel injection system.

3. How can I diagnose the source of OBDII code P120B Ford?

Diagnosis typically involves using a scan tool to check for the code, inspecting the fuel injector and related components, and performing a fuel pressure test.

4. Can a dirty fuel filter trigger OBDII code P120B Ford?

Yes, a clogged or dirty fuel filter can disrupt fuel flow and lead to issues with the fuel injector, potentially triggering this code.

5. What are the recommended repair tips for OBDII code P120B Ford?

Repair may involve cleaning or replacing the fuel injector, clearing any blockages, checking and repairing wiring connections, or replacing the fuel filter.

6. Is it safe to continue driving with OBDII code P120B Ford present?

It is not recommended to continue driving with this code as it can lead to further damage to the engine and negatively impact vehicle performance.

7. Can a software update fix OBDII code P120B Ford?

In some cases, a software update from the manufacturer may address issues related to this code, especially if it is related to the engine control module.

8. How much does it typically cost to repair OBDII code P120B Ford?

The cost of repair can vary depending on the underlying cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventative measures to avoid OBDII code P120B Ford in the future?

Regular maintenance, such as changing the fuel filter at recommended intervals and using high-quality fuel, can help prevent issues with the fuel injector and reduce the risk of triggering this code.

10. Can a DIY enthusiast address OBDII code P120B Ford, or is professional help necessary?

While some individuals with automotive repair experience may be able to address this code themselves, it is recommended to seek professional help, especially if unsure about diagnosing or repairing the issue.