P0173 Mercury Code - Fuel Trim Malfunction Bank 2
Quick Answer
The P0173 code for a Mercury vehicle indicates a fuel trim malfunction in Bank 2 of the engine. Common causes include Faulty oxygen sensor, Vacuum leak, Malfunctioning fuel injector. 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 Mercury indicates Fuel Trim Malfunction Bank 2.
- Common causes
- Common causes include Faulty oxygen sensor, Vacuum leak, Malfunctioning fuel injector.
- 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 P0173 Mercury Description
The P0173 code for a Mercury vehicle indicates a fuel trim malfunction in Bank 2 of the engine. This means that the engine control module (ECM) has detected that the air-fuel mixture is too rich or too lean on the side of the engine corresponding to Bank 2. The fuel trim is a term used to describe the adjustment made by the ECM to the air-fuel mixture to ensure optimal combustion. When the fuel trim is outside the specified range, it can lead to poor engine performance, reduced fuel efficiency, and increased emissions.
Common Causes of P0173 Mercury
- Faulty oxygen sensor
- Vacuum leak
- Malfunctioning fuel injector
- Clogged fuel filter
- Issue with the fuel pressure regulator
Symptoms of P0173 Mercury
- Rough idling
- Hesitation or stumbling during acceleration
- Decreased power
- Stalling
- Increased fuel consumption
How to Fix P0173 Mercury
- Diagnose the specific cause of the fuel trim malfunction by using a scan tool to read live data and identify the underlying issue.
- Inspect the oxygen sensor, vacuum lines, fuel injectors, fuel filter, and fuel pressure regulator for any signs of damage or malfunction.
- Replace any faulty components identified during the diagnostic process.
- Clear the diagnostic trouble codes from the ECM and reset the fuel trims.
- Test drive the vehicle to ensure that the issue has been resolved and that the fuel trims are within the specified range.
Cost to Fix P0173 Mercury
The cost of repairing a fuel trim malfunction in Bank 2 of a Mercury vehicle can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair cost for this issue can range from $200 to $500. This estimate includes the cost of parts such as oxygen sensors, fuel injectors, fuel filters, and fuel pressure regulators, as well as the labor cost for diagnosis and repair. It's important to note that the actual cost may be higher or lower based on the severity of the issue and the rates charged by auto repair shops in your area. It's recommended to obtain quotes from multiple shops to compare prices and ensure a fair cost for the repair.
Tech Notes for P0173 Mercury
When is the Code Detected?
- The amount of mixture ratio compensation is not correct
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