Genesis G80 Manifold Absolute Pressure (MAP) Sensor Guide (2017-2022)
Understanding the signs of a failing MAP sensor and how to choose the right replacement for your G80.
- A bad MAP sensor on a G80 most often causes a Check Engine Light (P0106), rough idle, and poor acceleration.
- Replacement is very easy for a DIYer and can be done in under 15 minutes with basic tools.
- There are no known recalls or TSBs for this specific part, so failures are not considered a widespread defect.
- High-quality aftermarket brands like Delphi and NGK offer reliable alternatives to the more expensive OEM part.
Is Your Genesis G80 MAP Sensor Failing?
A faulty Manifold Absolute Pressure (MAP) sensor can cause noticeable engine problems without preventing you from driving the car, but it shouldn't be ignored. Because it provides critical data for the air-fuel mixture, a bad sensor can lead to poor performance, bad fuel economy, and potentially damage other expensive components like spark plugs or the catalytic converter over time. Since the symptoms can be similar to other issues, like a vacuum leak, it's important to confirm the cause.
🎬 See how to diagnose MAP sensor codes like P0106 and P0107.Symptoms of a Bad MAP Sensor
If your G80's MAP sensor is going bad, you will likely experience one or more of the following issues:
- Check Engine Light: This is the most common sign. The system will likely store a trouble code, most often P0106, which points to a MAP sensor performance issue.
- Rough Idle: The engine may shake or sound unsteady when you're stopped at a light.
- Poor Acceleration: You might feel a delay or hesitation when you press the gas pedal, and the car may feel sluggish or underpowered.
- Reduced Fuel Economy: A common complaint is needing to fill up the gas tank more often. A bad sensor can trick the computer into using too much fuel.
- Black Smoke from Exhaust: If the engine runs too rich (too much fuel), you may see black smoke coming from the tailpipe.
No Recalls or Common Issues Found
Searches for official recalls or Technical Service Bulletins (TSBs) from Genesis or the NHTSA did not find any widespread, recognized issues for the MAP sensor on the 2017-2022 G80. Failures appear to be isolated incidents rather than a common defect.
Choosing the Right Aftermarket MAP Sensor
For the Genesis G80, several quality aftermarket MAP sensors are available. You do not necessarily need to buy the expensive OEM part from a dealer, as many aftermarket brands produce reliable sensors. They can be grouped into tiers based on reputation and quality.
Tier 1: OEM-Equivalent Brands
- Delphi: Delphi is a major OE supplier to global automakers. Their aftermarket parts are made to the same high standards, with robust testing to ensure accurate readings and durability. They are a top-tier choice for a reliable, long-lasting replacement.
- NGK (NTK): NTK is the sensor division of NGK, a brand famous for spark plugs. They are known for high-quality sensors that meet or exceed original equipment specifications and are rigorously tested under extreme conditions.
Tier 2: Quality Aftermarket Brands
- Standard Ignition (SMP): A large, reputable manufacturer of a wide range of aftermarket parts, including sensors. A solid choice for a balance of price and quality.
- Holstein: Holstein states they use the same factories as original manufacturers and backs their sensors with a 3-year/36,000-mile warranty, indicating confidence in their product quality.
- Walker Products: This brand focuses on engine management and emission control parts. They emphasize that their sensors are 100% tested to meet OE fit and function.
Tier 3: Budget-Friendly Options
- Global Parts, Skyward, True Tech: These brands offer a more affordable price point. While they can provide a functional replacement to get your car running properly, they may not have the same level of validation or use the same premium materials as the higher-tier brands. They are a good option for those on a tight budget.
Common Ordering Mistake
The Genesis G80 may use different MAP sensors depending on the engine (3.8L, 5.0L, or 3.3T) and model year. There are at least two different OEM part numbers in circulation (e.g., 39300-2B000 and 39300-2M417). Always verify the part fits your specific vehicle by using the year, make, model, and engine size before ordering.
Cost of Replacing a Genesis G80 MAP Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $21 - $133 |
| New OEM (Dealer) | $60 - $196 |
| Shop Labor | $50 - $100 |
| Total Professional Replacement | $142 - $338 |
Frequently Asked Questions
Can I replace the G80 MAP sensor myself?
Yes, this is a very DIY-friendly repair. The MAP sensor is located on the intake manifold and is usually held in place by a single bolt. The job involves disconnecting the electrical connector, removing one bolt, swapping the sensor, and re-installing. It typically takes less than 15 minutes and requires only basic hand tools.
🎬 Watch this quick walkthrough of a Genesis G80 MAP sensor replacement.What is the main trouble code for a bad MAP sensor?
The most common diagnostic trouble code (DTC) is P0106, which indicates a "Manifold Absolute Pressure/BARO Sensor Range/Performance" problem. This means the signal the computer is receiving from the sensor is not what it expects to see based on other inputs like engine speed and throttle position.
Will a bad MAP sensor cause my G80 to not start?
It's possible, but less common than other symptoms. If the sensor sends a signal that causes a severely incorrect air-fuel mixture, the engine may fail to start or may stall immediately after starting.
Should I clean my MAP sensor before replacing it?
You can try cleaning it, but it's often not a permanent fix. The sensors can fail electronically internally, which cleaning won't solve. If you do clean it, use a dedicated Mass Airflow (MAF) or electronics cleaner; do not use harsh chemicals like brake cleaner. Given the low cost of a new aftermarket sensor, replacement is often the more reliable solution.
🎬 Learn how to properly locate and clean a dirty MAP sensor.Helpful Videos
Technical Specifications
OEM Part Numbers: 39300-2B000 39300-2M417
The MAP sensor for the Genesis G80 is a 3-pin, bolt-on, plastic-body sensor that provides a variable voltage signal to the ECU corresponding to manifold pressure.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Genesis G80:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Genesis G80 MAP Sensor Failing?
- Symptoms of a Bad MAP Sensor
- No Recalls or Common Issues Found
- Choosing the Right Aftermarket MAP Sensor
- Tier 1: OEM-Equivalent Brands
- Tier 2: Quality Aftermarket Brands
- Tier 3: Budget-Friendly Options
- Common Ordering Mistake
- Cost of Replacing a Genesis G80 MAP Sensor
- Frequently Asked Questions
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