P0105: Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
Can you still drive? Driving is possible but the engine may stall or hesitate. Repair within a few days to prevent drivability issues.
What Does P0105 Mean?
Code P0105 indicates a general malfunction in the MAP (manifold absolute pressure) or barometric pressure sensor circuit. The ECU relies on this sensor to determine engine load and adjust fuel delivery accordingly. A faulty MAP signal leads to incorrect air-fuel ratios and poor engine performance.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty MAP sensor
- Cracked or disconnected vacuum hose to MAP sensor
- Corroded or damaged wiring at MAP sensor connector
- Intake manifold vacuum leak
Symptoms
- Check engine light on
- Rough idle or stalling
- Poor acceleration
- Increased fuel consumption
- Engine surging
Diagnostic Steps
- 1Read and document freeze frame data
- 2Inspect the vacuum hose connection to the MAP sensor
- 3Check MAP sensor connector for corrosion or damage
- 4Test MAP sensor voltage output at idle and at wide-open throttle
- 5Compare MAP readings to barometric pressure with key on, engine off
- 6Replace MAP sensor if readings are out of range
Recommended Parts & Tools
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $40 - $300 |
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Frequently Asked Questions
What is a MAP sensor?
A MAP sensor measures the air pressure inside the intake manifold. The engine computer uses this data to calculate engine load and determine the correct amount of fuel to inject.
Can a vacuum leak cause P0105?
Yes, a cracked or disconnected vacuum hose to the MAP sensor is one of the most common causes of P0105 and is an easy, inexpensive fix.
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