Chevrolet Malibu Manifold Absolute Pressure (MAP) Sensor: A 2017-2022 Guide
Experiencing poor acceleration or a check engine light on your Malibu? Your MAP sensor could be the culprit.
- Check for a disconnected charge air cooler tube (TSB 22-NA-224) before buying a new sensor, as it causes similar symptoms.
- Replacement is very easy for a DIYer, requiring only basic tools and about 20 minutes.
- Symptoms include rough idle, poor acceleration, and a check engine light with codes like P0106, P0107, or P0108.
- An OEM ACDelco sensor is often affordable, making it a strong choice over some aftermarket brands.
Is Your Malibu's MAP Sensor Failing?
A faulty Manifold Absolute Pressure (MAP) sensor can cause a range of frustrating engine problems. Because it provides critical data for the air-fuel mixture, a bad sensor can make your car run poorly. You might notice one or more specific symptoms if your MAP sensor is starting to fail.
Symptoms of a Bad MAP Sensor
- Check Engine Light: This is often the first sign. The system will store trouble codes like P0106, P0107, or P0108.
- Rough Idle: The engine may shake, vibrate, or struggle to maintain a steady RPM when stopped.
- Poor Acceleration: Your Malibu might feel sluggish, hesitate, or lack power when you press the gas pedal.
- Bad Fuel Economy: If the sensor sends incorrect data, the engine may use more fuel than necessary, and you'll notice more frequent trips to the gas station.
- Black Smoke from Exhaust: An incorrect, overly rich fuel mixture can result in black smoke coming from the tailpipe.
Check This First! (TSB 22-NA-224)
Before you replace the MAP sensor, check the connection of the large air tube going to the throttle body. For 2018-2022 Malibus, GM issued Technical Service Bulletin 22-NA-224 for a common issue where the charge air cooler (CAC) outlet tube disconnects from the throttle body. This can cause a "Reduced Engine Power" message and set codes like P1101 or P0299, which mimic a bad sensor. Simply reconnecting this tube and securing its clamp can often solve the problem.
🎬 Watch: Troubleshooting low power and check engine lights on a 2017 MalibuChoosing the Right Aftermarket MAP Sensor
While an OEM ACDelco sensor is a reliable choice and often competitively priced, several quality aftermarket brands are available. They can be grouped into tiers based on reputation and quality.
- Tier 1 (OEM Equivalent): Brands like Delphi are often original equipment suppliers to GM. Choosing a part from them is the next best thing to buying the part from the dealer. Standard Ignition (Standard Motor Products) is another top-tier brand with a long history of making reliable engine management parts.
- Tier 2 (Quality Alternatives): Brands such as Walker Products and Spectra specialize in fuel and engine management parts and market their products as meeting or exceeding OE specifications. They are generally considered a solid choice for a daily driver.
- Tier 3 (Budget-Friendly): Brands like Global Parts or other private labels offer a lower price point. While tempting, sensor quality can be inconsistent. For a critical sensor like the MAP, it's often worth spending a little more for a brand with a proven track record.
Pro Tip: OEM Can Be Affordable
Check the price of a genuine GM or ACDelco MAP sensor before buying aftermarket. Sometimes the price difference is minimal, making the factory part the smartest choice for guaranteed fit and performance.
Cost to Replace a Malibu MAP Sensor (2017-2022)
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $38.89 - $103.14 |
| New OEM Part (ACDelco) | $25 - $55 |
| Shop Labor | $40 - $80 |
| Total DIY Cost | $25 - $104 |
| Total Professional Replacement | $65 - $185 |
Frequently Asked Questions
Where is the MAP sensor located on my 2017-2022 Malibu?
The MAP sensor is mounted directly on the intake manifold. On the 1.5L and 2.0L Ecotec engines, it's typically easy to see on top of the engine, held in by a single Torx screw. You will need to remove the plastic engine cover to access it.
🎬 See this walkthrough for locating and servicing your MAP sensorIs replacing the MAP sensor a difficult job?
No, this is a great DIY task for beginners. The job typically requires only a Torx driver (T20 or T25) and about 15-20 minutes. You simply remove the engine cover, unplug the electrical connector, undo one screw, and swap the old sensor for the new one.
Are there any recalls for this part?
There are no direct recalls for the MAP sensor itself. However, a 2018 Malibu recall (NHTSA #19V642) addressed an ECM software issue that could cause stalling, a symptom that could be confused with a MAP sensor failure. Always check for open recalls on your specific vehicle.
What's the difference between a MAP and a MAF sensor?
A MAP (Manifold Absolute Pressure) sensor measures pressure in the intake manifold. A MAF (Mass Air Flow) sensor measures the volume and density of air entering the engine. Turbocharged cars like the Malibu often use both sensors to provide the most accurate data to the engine's computer under different loads and boost conditions.
🎬 Watch: How to replace the Mass Air Flow (MAF) sensorHelpful Videos
Technical Specifications
OEM Part Numbers: 12644228 12650598 12707766 25203477
The MAP sensor for the 2017-2022 Malibu is a 3-pin, plug-in style sensor that mounts to the intake manifold, often with a single Torx screw.
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.
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