How Much Does It Cost to Fix a P0175 Code?

Fixing a P0175 code typically costs between $150 and $900 in total, depending on what’s actually causing the “system too rich (Bank 2)” condition—simple fixes like a dirty mass airflow sensor are at the low end, while failing fuel injectors or an aging fuel pump can push costs toward the high end. Understanding what this code means, how mechanics diagnose it, and what repairs are usually involved can help drivers budget realistically and avoid paying for guesswork.

What P0175 Means and Why It Matters

P0175 is an OBD-II trouble code that stands for “System Too Rich (Bank 2).” In plain terms, the engine computer has detected that the air-fuel mixture on one side of the engine (Bank 2) consistently contains too much fuel and not enough air. This can hurt fuel economy, damage the catalytic converter over time, and cause the vehicle to fail emissions testing if left unaddressed.

Bank 2 and “Rich” Mixture Explained

On V6, V8, or other multi-bank engines, “Bank 2” refers to the cylinder head that does not contain cylinder #1. A “rich” condition means the engine is burning more fuel than intended relative to the amount of air. The engine control module (ECM) sees this via oxygen sensor readings and long-term fuel trims, then logs P0175 when the correction needed is outside its normal range.

Typical Cost Range to Fix P0175

Because P0175 can be triggered by several different faults, the price tag depends heavily on the root cause. In many real-world repairs, the final bill lands between $150 and $900, including both diagnosis and parts/labor, though luxury or turbocharged models can exceed that range.

Common Cost Components

When shops quote a price to address a P0175, they usually break the cost into diagnosis and the specific repair or replacement parts. The following list outlines typical cost components you may encounter when resolving this code.

• Diagnostic fee: $80–$170 at most independent shops and dealers (often applied to the repair if you proceed).
• Simple cleaning/maintenance fix: $0–$150 if it’s just a dirty MAF sensor or clogged air filter.
• Sensor replacement (O2 or MAF): About $200–$450 parts and labor, depending on brand and access.
• Fuel system repairs (injectors, pressure regulator, or pump): Roughly $300–$1,000+ depending on how many components and labor time.
• Intake/PCV-related repairs: Around $150–$400 for hoses, PCV valves, or manifold gaskets.

Taken together, these elements form the backbone of most P0175 repair bills, with the simpler maintenance-level fixes at the low end and more invasive fuel system work at the high end of the cost range.

Most Common Repairs for P0175 and Their Price Ranges

Not all P0175 cases are created equal: some are solved with a can of cleaner and shop labor, while others require new injectors or a sensor. Below is a closer look at the fixes drivers most frequently encounter, along with typical pricing in U.S. shops as of late 2024.

1. Cleaning or Replacing the Mass Airflow (MAF) Sensor

The MAF sensor measures incoming air. If it gets dirty or fails, it can misreport airflow, causing the ECM to add too much fuel and trigger a rich code like P0175—often paired with P0172 (Bank 1 rich).

The following list covers the typical cost of addressing MAF-related issues when a P0175 code is present.

• MAF cleaning only: $0–$20 if DIY with MAF cleaner; $50–$120 at a shop including labor.
• MAF sensor replacement (aftermarket): $150–$300 installed.
• MAF sensor replacement (OEM on some imports/luxury): $250–$450 installed.

In many cases where the MAF is the root cause, fixing P0175 is relatively affordable, especially if cleaning restores proper sensor function without needing a full replacement.

2. Replacing a Faulty Oxygen Sensor (Bank 2)

Oxygen sensors (especially the upstream sensor on Bank 2) are critical to mixture control. A slow or biased sensor can falsely signal a lean or rich condition, causing the ECM to over-correct and set P0175.

The list below summarizes typical cost ranges for oxygen sensor-related repairs when addressing a P0175 code.

• Upstream O2 sensor parts: $60–$200 for most vehicles (aftermarket vs. OEM, plus vehicle type).
• Labor for O2 sensor: $80–$180, usually 0.5–1.5 hours depending on access and rust.
• Total typical O2 sensor repair cost: $150–$400 per sensor installed.

Because O2 sensors are wear items, replacement is common on higher-mileage vehicles and can resolve P0175 when sensor data is clearly incorrect and other causes are ruled out.

3. Addressing Fuel Injector Problems (Bank 2)

Leaking or stuck-open fuel injectors on Bank 2 can literally dump extra fuel into the cylinders, creating a rich condition the ECM can’t counteract. This is a classic mechanical cause for P0175.

The following list details price ranges for injector-related solutions likely to arise in a P0175 diagnosis.

• Professional injector cleaning (on-vehicle service): $100–$200.
• Bench/ultrasonic cleaning and testing (removed injectors): $20–$40 per injector plus removal/installation labor.
• Single injector replacement: $150–$350 installed, depending on engine layout and part cost.
• Full set of injectors (if multiple are aged/failing): $400–$1,000+ installed, especially on V6/V8 or direct-injection engines.

While injector repairs are among the more expensive P0175 fixes, they’re sometimes the only way to solve a persistent rich condition when electronic controls are functioning properly.

4. Fuel Pressure Regulator or Fuel Pump Issues

Excessive fuel pressure from a stuck regulator or failing fuel pump can make all injectors flow more fuel than commanded, leading to a rich condition that shows up more clearly on one bank (sometimes as P0175 and P0172 together).

The list below highlights the usual cost ranges when fuel pressure hardware is blamed for a P0175 code.

• Fuel pressure test (diagnostic): Often included in the initial diagnostic fee; standalone $40–$80.
• Fuel pressure regulator replacement: $150–$400 installed, depending on design and location.
• Fuel pump module replacement: $400–$900+ installed, higher for SUVs, trucks, or vehicles requiring tank removal.

Because fuel system parts are labor-intensive on many models, this path can become one of the pricier routes to resolving a stubborn P0175 code.

5. Intake, PCV, and Evap-Related Issues

While vacuum leaks more often cause lean codes, issues like a stuck PCV valve, incorrect routing, or vapors being drawn too heavily from the EVAP system can contribute to mixture imbalance and confused fuel trims that manifest as P0175 on one bank.

The following list describes typical cost ranges for intake and PCV-related fixes that may appear in a P0175 repair estimate.

• PCV valve or hose replacement: $50–$200 installed.
• Intake manifold gasket replacement: $250–$600 installed, depending on engine layout.
• Small hose/line repairs (vacuum, evap, crankcase vent): $50–$250 depending on parts and access.

These repairs can also improve drivability and emissions overall, and they’re often uncovered during a thorough smoke test or visual inspection prompted by codes like P0175.

How Mechanics Diagnose P0175 (And Why That Matters for Cost)

Accurate diagnosis is the difference between a $200 fix and a string of $300 “maybe this will fix it” parts. Reputable shops follow a step-by-step process rather than relying on guesswork.

Key Diagnostic Steps

Technicians use a mix of scan tools, physical inspection, and targeted testing to pinpoint the cause of P0175. The next list illustrates the diagnostic steps that typically appear on an invoice or service report.

1. Scan tool check: Read all codes (P0175 often appears with P0172 or misfire codes) and note fuel trims and O2 sensor data.
2. Visual inspection: Look for damaged wiring, loose connectors, or obvious fuel leaks around Bank 2.
3. MAF and O2 sensor evaluation: Monitor live data to see if sensors respond properly under various loads.
4. Fuel pressure test: Verify that fuel pressure is within spec and stable.
5. Smoke test or intake check: Confirm there are no major leaks or PCV/evap routing issues.
6. Injector balance or leak-down tests: If fuel system issues are suspected, check individual injectors or pressure decay.

This structured approach keeps costs more predictable by ensuring the parts replaced are actually faulty and directly responsible for the P0175 code.

DIY vs. Professional Repair: Where You Can Save

Some aspects of a P0175 diagnosis and fix are within reach for experienced DIYers, while others are safer and more cost-effective at a professional shop.

What Many Owners Can Do Themselves

Certain low-risk checks and maintenance tasks can reduce costs if you’re comfortable working around the engine bay. The following list groups common DIY-friendly steps for tackling a P0175 code.

• Check the air filter and intake ducting: Ensure there are no blockages, collapsed hoses, or aftermarket parts installed incorrectly.
• Clean the MAF sensor: Using proper MAF cleaner only (never touch the sensor element or use brake/carb cleaner).
• Inspect visible vacuum and PCV hoses: Look for cracks, loose connections, or obvious damage, especially on Bank 2 side.
• Use a basic OBD-II scanner: Read P0175, check for related codes, and monitor fuel trims if your scanner supports it.

Doing these steps on your own can sometimes clear the issue at minimal cost—or at least give your mechanic a head start, potentially lowering diagnostic time and labor charges.

When Professional Help is Wiser

Some P0175 scenarios involve safety hazards or complex procedures. In those situations, paying a professional often costs less than risking misdiagnosis or damage.

The following list outlines scenarios in which professional diagnosis and repair are usually recommended for a P0175 code.

• Fuel system work: Dropping a fuel tank, replacing a pump, or dealing with pressurized lines requires proper tools and safety practices.
• Injector testing/replacement: Access on modern engines can require special procedures and torque specs.
• Advanced scan tool interpretation: Reading live data, long- and short-term fuel trims, and sensor graphs accurately takes training and equipment.
• Emissions compliance: If you’re in a region with strict testing, a shop can verify the vehicle is truly fixed before inspection.

In these cases, the added labor cost is often offset by greater certainty that the P0175 code won’t return, and that no additional components are inadvertently damaged.

Factors That Make the Price Go Up or Down

Not every vehicle or situation sits at the same point on the cost spectrum. Several factors can move a P0175 repair toward the budget or premium side of the scale.

Vehicle Type and Age

Modern, high-end cars and trucks often come with more complex fuel and emissions systems, as well as tighter engine bays that increase labor time. Older vehicles may have cheaper parts but more corrosion or wear that complicates disassembly.

Parts Quality and Source

Choosing OEM sensors and injectors almost always costs more upfront than aftermarket options but can sometimes provide better long-term reliability. Independent shops may offer more flexible part choices than dealerships, affecting the final bill for a P0175 fix.

Regional Labor Rates

Shop labor rates in major metro areas frequently run from $140 to $220 per hour, whereas rural or smaller markets might charge $90 to $140. For jobs requiring multiple hours—such as injector replacement or fuel pump service—this difference can significantly influence total cost.

How to Talk to Your Mechanic About P0175

Arriving at the shop informed can help you avoid unnecessary parts replacement and keep the bill closer to the realistic range for your situation.

Smart Questions to Ask

Clear communication can reduce misunderstandings and help you judge whether the shop is diagnosing P0175 methodically. The list below proposes practical questions to bring up before approving major work.

• “What are the fuel trims and sensor readings showing on Bank 2?” This checks that they’re using data, not guessing.
• “What tests have you done to confirm the part you’re replacing is bad?” You want to hear about tests, not just “this code usually means X.”
• “Are there any related codes, like P0172 or misfires?” Multiple codes together can point to a broader issue.
• “Can you give me an itemized estimate for parts, labor, and diagnostic time?” This clarifies how much of the bill is troubleshooting versus actual repair.

Having this conversation upfront often leads to clearer expectations and fewer surprises when it’s time to pay for the repair that ultimately resolves the P0175 code.

Summary

P0175—“System Too Rich (Bank 2)”—usually costs $150 to $900 to fix, with the actual number driven by the root cause. Cheaper outcomes often involve cleaning or replacing a MAF sensor or a single oxygen sensor; more expensive repairs arise when leaking injectors, an over-fueling pump, or complex intake issues are involved. A proper diagnostic workup—scan data, fuel pressure tests, and inspection—matters far more than replacing parts based on the code alone. For many owners, basic DIY checks can trim costs, but fuel system and injector work are usually better left to professionals. Going in informed about typical repairs and price ranges helps ensure you pay for the fix you actually need to clear P0175 and keep it from coming back.