P0173 Dodge Code - Fuel System 2/1 Rich Control Over Limit
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 Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor. 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 Dodge indicates Fuel System 2/1 Rich Control Over Limit.
- Common causes
- Common causes include Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor.
- 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 Dodge 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 Dodge?
- Faulty Front Heated Oxygen Sensor
- Faulty Spark Plugs
- Faulty Mass Air Flow (MAF) sensor
- Exhaust Gas Leaks
- Ignition Misfiring
- Incorrect Fuel Pressure
- Faulty Fuel Injectors
How to Fix the DTC P0173 Dodge?
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 Dodge 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 Dodge Code
What does the OBDII code P0173 mean on a Dodge?
P0173 indicates a fuel trim malfunction in Bank 2. The "rich control over limit" means the engine is running with too much fuel or not enough air on that bank.
What are the common symptoms of code P0173 on a Dodge?
Symptoms may include poor fuel economy, rough idling, black smoke from the exhaust, reduced engine performance, and an illuminated check engine light.
What causes the P0173 code on a Dodge?
Common causes include a faulty mass air flow (MAF) sensor, vacuum leaks, clogged fuel injectors, a damaged oxygen sensor, or a failing fuel pressure regulator.
Can a dirty air filter trigger the P0173 code?
Yes, a dirty or clogged air filter can disrupt the air-to-fuel ratio and contribute to triggering the P0173 code.
How is the P0173 code diagnosed in a Dodge?
A mechanic will use a scan tool to check freeze frame data, inspect for vacuum leaks, test the MAF sensor, examine oxygen sensor readings, and ensure proper fuel pressure.
Can a bad MAF sensor cause the P0173 code?
Yes, a malfunctioning MAF sensor can send incorrect air intake readings to the engine control module, leading to a fuel trim imbalance and the P0173 code.
How do you fix the P0173 code on a Dodge?
Repairs may include cleaning or replacing the MAF sensor, fixing vacuum leaks, replacing oxygen sensors, or addressing fuel system issues like clogged injectors or a bad fuel pressure regulator.
Can driving with the P0173 code damage my Dodge’s engine?
Driving with the P0173 code for extended periods can cause further engine damage, reduced performance, and increased emissions, so it’s best to address the issue promptly.
Does fuel quality affect the P0173 code?
Poor-quality or contaminated fuel can impact the air-to-fuel ratio and potentially trigger the P0173 code.
Is it safe to clear the P0173 code without fixing the problem?
Clearing the code without resolving the underlying issue will likely result in the code returning and may lead to further engine problems over time.
Discuss the causes and fixes for P0173 Dodge OBDII Code
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