Your car’s manifold absolute pressure (MAP) sensor measures pressure in the intake manifold and sends that reading to the engine computer. The computer uses it with other sensor data to help calculate engine air mass and control fuel delivery and ignition timing. A faulty MAP sensor can contribute to drivability problems, but symptoms and trouble codes alone cannot confirm it is the cause.
What a MAP sensor does
The MAP sensor converts intake-manifold pressure into an electrical signal that the engine control module (ECM) or engine control unit (ECU) can interpret. The computer combines that reading with information such as engine speed and intake-air temperature to estimate the air entering the engine and make fueling and ignition decisions. Delphi’s MAP sensor guide and Delphi Technologies’ explainer describe this role.
MAP means manifold absolute pressure. With the engine off, manifold pressure is close to the surrounding atmospheric pressure. Once the engine runs, pressure changes as operating conditions and load change. Many naturally aspirated engines have more manifold vacuum at idle and less as the throttle opens. A turbocharged engine can also produce pressure above atmospheric pressure, or boost, so MAP is not simply a measure of vacuum.
Engine designs vary: a vehicle may use a MAP sensor, a mass airflow (MAF) sensor, or both. Sensor location and how the computer uses its reading depend on the specific engine.
Recommended Free Tools
#1 Best Overall
- Package Contents: One (1) Unit - Walker Products 225-1260 Manifold Absolute Pressure Sensor; See Amazon Confirmed Fit to verify vehicle compatibility
- Optimized Engine Efficiency: Delivers accurate pressure data to help the ECU optimize the air-fuel mixture for improved fuel efficiency, performance, and reliable engine operation
- Accurate Pressure Sensing: Provides precise manifold pressure measurements to support optimal engine performance and responsiveness
- Easy, Direct Installation: Designed for quick and straightforward installation, minimizing vehicle downtime during replacement
- OE-Tested Durability: Built from high-quality materials and rigorously tested to meet or exceed OE standards for long-lasting reliability and consistent performance
Signs a MAP sensor may be failing
A bad sensor is one possible cause of engine-management problems, not the only one. Potential signs include:
- Rough idle, stalling, surging, or hesitation
- Slow acceleration, weak power, or misfires
- Poor fuel economy or rich- or lean-running behavior
- A check-engine light or an emissions test failure
- Fuel odor with a rich-running condition; overheating or intake backfire may be reported with a lean condition
These symptoms overlap with faults elsewhere in the engine and engine-management system. Treat them as reasons to investigate rather than proof that the MAP sensor has failed. Delphi’s guide and AA1Car’s MAP sensor article describe overlapping symptoms and possible causes.
Rank #2
- Replaceable part numbers: 16187556, 9359409, 12614973, 16249939, 213-796, 213-351, 213-1742, 213-4434, PS10000, SU1078,213796, 213351, 2131742, 2134434, 8161875560, 8093594090, 38613212, 8162499390, 881731, 861249A1, 3861321, AS59, AS155, EC1636
- Compatible Vehicle Types 1: Compatible with Chevrolet/Chevy 96-05 Astro/ Blazer, 02-06 Avalanche 1500/ 2500, 96-00 C2500/ C2500 Suburban/ K3500, 96-02 C3500/ C3500 HD, 95-02 Camaro, 05-07 Cobalt, 96-08 Express 1500/ 2500/ 3500/ Tahoe, 00-05 Impala, 96-99 C1500/ C1500 Suburban/ K1500/ K1500 Suburban/ K2500/ K2500 Suburban/ Lumina, 95-05 Monte Carlo, 96-04 S10, 99-08 Silverado 1500, 01-07 Silverado 1500 HD/ Silverado 3500, 99-04 Silverado 2500
- Compatible Vehicle Types 2: Compatible with Buick 05-06 Allure/ LaCrosse, 96-05 LeSabre/ Park Avenue, 06-11 Lucerne, 04-07 Rainier, 97-04 Regal, 96-97 Riviera; Compatible with Cadillac 95-04 Deville, 06-11 DTS, 95-02 Eldorado, 99-08 Escalade, 03-08 Escalade ESV/ EXT, 95-04 Seville, 04-09 SRX/ XLR, 05-10 STS
- About after-sales service: we provide warranty service, if you have any problems with the products you purchased, please contact us
- Note: Please check fitment, part number, and part picture to confirm that the part fits your vehicle
What MAP-related trouble codes mean
Diagnostic trouble codes can point toward a circuit or performance problem, but they do not identify the failed component by themselves. Common MAP-related codes include:
| Code | General indication |
|---|---|
| P0105 | MAP circuit fault |
| P0106 | MAP range or performance issue |
| P0107 | MAP circuit low input |
| P0108 | MAP circuit high input |
| P0109 | MAP circuit intermittent input |
| P0068 and P0069 | Correlation codes listed by Delphi |
| P1106 and P1107 | Additional codes listed by Delphi |
A code may result from damaged wiring, a poor connector, a blocked or leaking vacuum hose on designs that use one, a vacuum leak, another sensor, or a separate engine fault. Confirm the exact code description and diagnostic procedure for the vehicle rather than replacing a sensor based on the code alone.
Rank #3
- Replace OE Part Number: 33000153, 16137039, 12569240, 16017460, PS10075, 8160174600, 17112715, 2131545, 213-1545, 9389131, 7696064, 60811534, 19204S, 21020103, 213185, 33000273, 3850396, 307007, SU105, 5S2397, AS5, AS5T, AS61, AS165, 1984-0004, GEGT7610-17, GEGT7610-15S2397.
- Compatible With: 1985-2004 for Chevy Impala, 1987-1995 for Chevy Blazer, 1995-1999 for Chevy Tahoe, 1985-1997 for Chevy S10, 1984-2002 for Chevy Camaro, 1984-1995 for GMC Jimmy, 1985-1990 for GMC S15, 1985-2004 for Pontiac Grand Am, 1985-1996 for Cadillac Fleetwood, 1985-1990 for Buick LeSabre, 1999-2004 for Oldsmobile Alero and more. Please See description below for the full vehicle list.
- Features & Benefits: The manifold absolute pressure (MAP) sensor is stable performance and long in working life with temperature compensation, high level of accuracy, version with additional inte-grated temperature sensor. It monitors the changes in the intake manifold or vacuum pressure during various engine operating loads and sends a corresponding signal to the ECU.
- Easy to install: You can replace parts by yourself and solve your vehicle problems, just need to remove the old parts and install the new parts, so as to save you a lot of money and time. Please check youtube video if you have installation problem.
- Note: Please make sure that the parts, connectors and plugs on our pictures are the same as your old products before ordering, to avoid wrong purchases, 100% undergo a strict quality tested before shipping. If the Manifold Absolute Pressure Map Sensor fails simply contact us for a replacement or refund, we will reply you within 12 working hours.
How to check a suspected MAP sensor
Use the service information for the exact vehicle, engine, and sensor. Generic voltage values are not universal pass-or-fail specifications.
- Inspect the electrical connection. Check the connector, harness, pins, ground, and reference supply for looseness, corrosion, cracks, melting, or other visible damage.
- Check any vacuum hose. If the design uses a separate hose, look for blockage, kinks, leaks, loose connections, or contamination.
- Review scan-tool data. Compare key-on, engine-off MAP data with the expected barometric pressure for the conditions, then watch whether the reading responds plausibly as engine load changes. Consider related sensor readings and calculated load instead of judging one value in isolation.
- Test sensor response only by the specified method. A hand vacuum pump can help assess response on designs that support that test. For an analog sensor, voltage should change as applied vacuum changes. Digital frequency-output sensors require appropriate frequency-capable equipment. AA1Car warns that an ordinary voltmeter can damage a specific Ford BP/MAP sensor type, so use the vehicle-specific procedure and equipment.
For more detail on test approaches and sensor types, see AA1Car’s technical article and Delphi’s guide.
Rank #4
- [PREMIUM PERFORMANCE] - Bosch Manifold Absolute Pressure (MAP) Sensors provide accurate air pressure measurement to very fine tolerances for efficient engine performance
- [LONGER LIFE] - Extremely sturdy sensor design employs a special coating that provides resistance to harmful chemicals inside the intake manifold
- [INNOVATIVE TECHNOLOGY] - Bosch continually improves its MAP sensor designs with the latest chip technology for optimum vehicle performance
- [SUPERIOR ENGINEERING] - Designed to meet or exceed your vehicle’s original equipment specifications for performance, driveability, economy, and emissions
- [TROUBLE FREE INSTALLATION] - OE identical connector ports and attachment points ensure an exact fit and a trouble free installation process
When replacement makes sense
Replace the MAP sensor only when diagnosis supports that repair. The replacement must match the vehicle’s exact application: calibration differences across engines and model years can affect engine management. Repair a damaged hose or wiring fault as appropriate rather than assuming a new sensor will correct it. Follow the manufacturer’s removal and installation procedure; some vehicles may also require a scan tool to clear a stored warning after the repair. Delphi’s MAP sensor product information underscores that the part is application-specific.
Quick Recap
Best Value
- Part Number Fitment: 16187556, 9359409, 12614973, 16249939, 8161875560, 8093594090, 38613212, 8162499390, 881731, 9359409, 861249A1, 3861321, AS59, AS155, EC1636, 213-796, 213-351, 213-1742, 213-4434, PS10000, SU1078
- Please confirm your car model and the OE of the part before purchasing to avoid buying the wrong.
- Please confirm your part picture before purchasing to avoid buying the wrong.
- It could correctly replace the original part.
- Thank you!
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
