P0105

Manifold Absolute Pressure/Barometric Pressure Sensor Circuit

Fuel & air metering Generic OBD-II High

What it means

P0105 means the ECM has detected a fault in the manifold absolute pressure (MAP) sensor circuit. The MAP sensor measures intake manifold pressure so the ECM can gauge engine load and meter fuel and timing. A faulty signal can make the engine run rough, lose power, use more fuel, and in some cases stall or start hard.

High

Can I keep driving? Usually drivable but expect poor running — a bad MAP signal can cause rough idle, hesitation, stalling, or hard starting, so repair soon.

Real-world scan data

Seen in

1,023

scans in the past year

Found in

0.2%

of scans

0.3%

of scans that found faults

Appears alongside · share of P0105 scans

P0110in 28.0% of scans

P0120in 24.4% of scans

P0115in 19.0% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Rough idle, hesitation, or surging
Reduced power and poor acceleration
Poor fuel economy
Possible stalling or hard starting

Common causes

Most likely first

Faulty MAP/BARO sensorLikely
Damaged or corroded wiring or connector in the sensor circuitCommon
Vacuum leak or blocked/cracked MAP vacuum port or hoseCommon
Less commonly, an ECM/PCM faultLess often

How to diagnose & fix

Work through it in order

Scan and read freeze-frame data, then check the live MAP value at key-on (it should read close to barometric pressure).
Inspect the sensor's vacuum source and hose for leaks or blockage.
Check the sensor wiring and connector for damage or corrosion.
Compare the MAP reading against actual manifold pressure under load.
Replace the MAP/BARO sensor if it reads inaccurately, then clear and retest.

FAQ

Quick answers

Is it safe to drive with P0105?+

You can usually drive short distances, but the engine may run poorly and could stall or be hard to start. Repair it soon to avoid being stranded.

Can I just clear P0105?+

It will come back until the sensor, wiring, or vacuum leak is fixed. The MAP signal is central to fueling, so address the cause.

Read & clear P0105 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX