How much does it cost to fix P0107?

DIY repair typically costs $10–$60 for parts. Professional repair runs $100–$350 including parts and labor.

P0107

Powertrain

Moderate

Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

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The P0107 code is set when the engine control module (ECM) detects that the signal voltage from the Manifold Absolute Pressure (MAP) sensor is below the minimum expected threshold, typically below about 0.5 volts. Most MAP sensors operate on a 0.5V to 4.5V scale, where low voltage corresponds to high vacuum (low absolute pressure) and high voltage corresponds to low vacuum (high absolute pressure or boost). A reading below 0.5V indicates either the sensor has failed or there's a problem in the circuit.

The most common cause is a failing MAP sensor, but before replacing it, check the basics. Verify that the MAP sensor connector is fully seated and that the pins show no corrosion. Using a multimeter, check that the sensor is receiving its 5-volt reference supply and has a good ground. If the reference voltage is missing, the problem may be upstream in the wiring or even at the ECM. Also check the vacuum hose connection to the sensor.

This code will cause noticeable driveability problems because the ECM cannot accurately calculate engine load without a valid MAP signal. The engine may default to a fixed fuel map that provides safe but inefficient operation. Plan to diagnose and repair within the week. The MAP sensor itself is inexpensive and usually easy to access, making this a good candidate for a DIY repair.

Severity

Moderate — Address SoonThis Week

Symptoms

•Check Engine Light is on
•Engine runs rough and may stall
•Lack of power during acceleration
•Engine surges or hunts at idle
•Poor fuel economy
•Engine may be difficult to start

Likely Causes

Faulty MAP sensor outputting low voltage35%

The MAP sensor's internal sensing element or circuit has degraded, causing it to output a voltage below the minimum threshold expected by the ECM.

Wiring issue — open circuit or short to ground25%

A broken signal wire or a short to ground in the MAP sensor circuit drops the voltage at the ECM's input pin below the acceptable range.

Corroded or loose MAP sensor connector20%

A corroded or poorly seated connector can create high resistance or an intermittent open in the signal line, resulting in a low voltage reading at the ECM.

Vacuum hose disconnected or leaking15%

If the vacuum reference hose to the MAP sensor is disconnected or severely leaking, the sensor may read atmospheric pressure instead of manifold vacuum, producing a low voltage reading under certain conditions.

ECM internal circuit fault5%

Rarely, the ECM's pull-up resistor or input circuit for the MAP sensor can fail, resulting in a low voltage reading regardless of actual sensor output.