P0173 Mitsubishi Code - Fuel Trim Malfunction Bank 2
Quick Answer
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring. 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
- P0173 Mitsubishi indicates Fuel Trim Malfunction Bank 2.
- Common causes
- Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring.
- 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 P0173 Mitsubishi Description
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
What are the Possible Causes of the DTC P0173 Mitsubishi?
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
How to Fix the DTC P0173 Mitsubishi?
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 P0173 Mitsubishi 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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Frequently Asked Questions about P0173 Mitsubishi Code
1. What does OBDII code P0173 for a Mitsubishi indicate?
The P0173 code refers to a fuel trim malfunction on Bank 2 of the engine, specifically indicating a rich condition.
2. What are the common symptoms of a P0173 code in a Mitsubishi?
Common symptoms of a P0173 code may include decreased fuel efficiency, rough idling, engine hesitation, and potentially an illuminated check engine light.
3. What are the possible causes of a P0173 code in a Mitsubishi?
Causes of a P0173 code can include a faulty oxygen sensor, a vacuum leak, a dirty or clogged fuel injector, a malfunctioning mass airflow sensor, or issues with the fuel pressure regulator.
4. How can I diagnose a P0173 code in my Mitsubishi?
To diagnose a P0173 code, you can use an OBDII scanner to retrieve the code and then conduct further tests to check the oxygen sensor, vacuum lines, fuel injectors, mass airflow sensor, and fuel pressure regulator for any issues.
5. How can I repair a P0173 code in my Mitsubishi?
Repairing a P0173 code may involve replacing a faulty oxygen sensor, cleaning or replacing clogged fuel injectors, fixing vacuum leaks, cleaning the mass airflow sensor, or addressing any fuel pressure regulator problems.
6. Can driving with a P0173 code in my Mitsubishi cause further damage?
Continued driving with a P0173 code can potentially lead to decreased fuel efficiency, reduced engine performance, and further damage to engine components over time if left unresolved.
7. How urgent is it to address a P0173 code in my Mitsubishi?
While your vehicle may still be driveable with a P0173 code, it is recommended to address the issue promptly to prevent potential damage to the engine and ensure optimal performance and fuel efficiency.
8. Will resetting the OBDII system clear a P0173 code in my Mitsubishi?
Resetting the OBDII system may temporarily clear the P0173 code, but if the underlying issue is not addressed and fixed, the code is likely to reappear after driving the vehicle for some time.
9. Can a P0173 code in a Mitsubishi be triggered by using low-quality fuel?
Using low-quality or contaminated fuel can potentially contribute to triggering a P0173 code by affecting the air-fuel mixture in the engine, leading to a rich condition on Bank 2.
10. Is it recommended to seek professional help for diagnosing and repairing a P0173 code in my Mitsubishi?
If you are not experienced in diagnosing and repairing automotive issues, it is advisable to seek professional help from a certified mechanic or dealership to accurately diagnose and fix the P0173 code in your Mitsubishi.
Discuss the causes and fixes for P0173 Mitsubishi OBDII Code
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Am Charles from Lagos - Nigeria, My Mitsubishi Montero Limited is consuming excessive fuel like 30+ Litres per 100km, it's usually very hot under the foot matt & interiorly & even exhume hotness around drivers side.
I was told to replace the catalyst under the drivers seat that was originally not there. This i did & even minor leakages on the exhaust was also closed up But the Problems.
Mechanics seem to not knowing & doing guess work or trial & error with d vehicle cause I checked up a friend with The exact vehicle model has only one of the three catalysts yet functions optimally.
My engine sounds & seem very okay as confirmed by all the mechanics that examined it.
The Hotness & the very excessive fuel still persists.I scanned & it gave the results as:
P0173,
P0170,
P0128,
P0705,
P0325Please what should I do......?
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