AutoCodes – Volvo – P1172 Volvo

P1172 Volvo Code - Long Term Fuel Trim

Quick Answer

The control module receives information from the heated oxygen sensor about fuel/air mixture when idling at both lower and upper part-load range. Common causes include Intake air leakage, Exhaust system air leakage, Low fuel pressure. 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: P1172 Volvo indicates Long Term Fuel Trim.
Common causes: Common causes include Intake air leakage, Exhaust system air leakage, Low fuel pressure.
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 1,760

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 Jul 19, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1172 Volvo Description

The control module receives information from the heated oxygen sensor about fuel/air mixture when idling at both lower and upper part-load range. If the fuel/air mixture deviates from the computed ideal value, short-term fuel trim will compensate for this by adjusting the injection time so that the ideal value is achieved.

OBDII Code P1172 Volvo - Long Term Fuel Trim - AutoCodes.com — P1172 Volvo Code - Long Term Fuel Trim

What does this mean?

What are the Possible Causes of the DTC P1172 Volvo?

Intake air leakage
Exhaust system air leakage
Low fuel pressure
Faulty heated oxygen sensor

How to Fix the DTC P1172 Volvo?

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 P1172 Volvo 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 P1172 Volvo code?

Need more information on how to fix the P1172 Volvo code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1172 Volvo 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 P1172 Volvo Code

1. What does OBDII code P1172 for Volvo indicate?

- OBDII code P1172 in Volvo vehicles specifically refers to Long Term Fuel Trim at Idle Bank 1.

2. What are some common symptoms of OBDII code P1172 in a Volvo?

- Common symptoms of code P1172 may include rough idling, decreased fuel efficiency, and potential engine stalling.

3. What are the possible causes of OBDII code P1172 in a Volvo?

- The code P1172 in a Volvo may be triggered by issues such as a faulty oxygen sensor, vacuum leaks, dirty mass airflow sensor, or a problem with the fuel system.

4. How can I diagnose the cause of OBDII code P1172 in my Volvo?

- Diagnosing code P1172 typically involves conducting a thorough inspection of the oxygen sensors, checking for vacuum leaks, testing the mass airflow sensor, and ensuring the fuel system is functioning properly.

5. Can I continue driving my Volvo with OBDII code P1172 present?

- It is not recommended to drive your Volvo with code P1172 present, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair OBDII code P1172 in my Volvo?

- Repairing code P1172 may involve replacing a faulty oxygen sensor, fixing any vacuum leaks, cleaning or replacing the mass airflow sensor, or addressing issues with the fuel system.

7. Is it possible to clear OBDII code P1172 in a Volvo without fixing the underlying issue?

- Clearing the code without addressing the root cause is not recommended, as the issue will likely persist and trigger the code again.

8. Can a DIY enthusiast fix OBDII code P1172 in a Volvo?

- Depending on the underlying cause, some aspects of repairing code P1172 in a Volvo may be manageable for a DIY enthusiast, such as replacing an oxygen sensor. However, complex issues may require professional assistance.

9. How much does it typically cost to repair OBDII code P1172 in a Volvo?

- The cost of repairing code P1172 in a Volvo can vary widely depending on the specific issue causing the code and whether professional labor is required. Costs may range from a few hundred to over a thousand dollars.

10. How often does OBDII code P1172 occur in Volvo vehicles?

- OBDII code P1172 related to Long Term Fuel Trim at Idle Bank 1 is not extremely common in Volvo vehicles, but it can still occur due to various underlying issues with the fuel system and sensors.