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P1243 Buick Code - Injector Circuit Cylinder 8 Intermittent

Quick Answer

The P1243 Buick code indicates an issue with the injector circuit in cylinder 8 of the engine that is intermittent. Common causes include Faulty fuel injector in cylinder 8, Damaged wiring harness or connector, ECM malfunction. 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
P1243 Buick indicates Injector Circuit Cylinder 8 Intermittent.
Common causes
Common causes include Faulty fuel injector in cylinder 8, Damaged wiring harness or connector, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1243 Buick Description

The P1243 Buick code indicates an issue with the injector circuit in cylinder 8 of the engine that is intermittent. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber at the right time. When this circuit is intermittent, it means that there is a problem with the electrical connection or signal to the fuel injector in cylinder 8.

OBDII Code P1243 Buick - Injector Circuit Cylinder 8 Intermittent
P1243 Buick Code - Injector Circuit Cylinder 8 Intermittent

Common Causes of P1243 Buick

  1. Faulty fuel injector in cylinder 8
  2. Damaged wiring harness or connector
  3. ECM malfunction
  4. Poor connection in the injector circuit

Symptoms of P1243 Buick

  1. Poor fuel economy
  2. Rough idling
  3. Engine misfires
  4. Hesitation during acceleration
  5. Stalling

How to Fix P1243 Buick

  1. Begin by diagnosing the specific cause of the issue using a scan tool to identify the faulty component.
  2. Inspect the wiring harness and connector for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the fuel injector in cylinder 8 to ensure it is functioning correctly. Replace if necessary.
  4. Check the ECM for any error codes or malfunctions. Reset or replace if required.
  5. Clear the fault code from the system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1243 Buick

The typical repair costs for addressing the P1243 Buick code can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's advisable to inquire about local rates for a more accurate estimate.

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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.

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