P0069
Manifold Absolute Pressure - Barometric Pressure Correlation
Fuel & air metering
Generic OBD-II
High
What it means
P0069 sets when the manifold absolute pressure (MAP) reading doesn't correlate with barometric pressure the way the ECM expects. Because MAP is a primary load signal for fueling, a mismatch can cause hesitation, rough idle, and occasional stalling. A drifting MAP sensor, a clogged sensor port, or a vacuum leak are the most common causes.
High
Can I keep driving? Usually drivable, but hesitation, stalling, or reduced power are possible — fix it before it strands you.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or hesitation on acceleration
- Rough idle
- Possible stalling
- Slightly worse fuel economy
Common causes
Most likely first
- Faulty or drifting MAP sensorLikely
- Vacuum leak affecting manifold pressureCommon
- Clogged or restricted MAP sensor port/passageCommon
- Wiring or connector problems in the MAP/baro circuitLess often
- Faulty barometric-pressure sensor (often internal to the PCM)Less often
- Restricted intake duct or dirty air filterLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare MAP and baro readings at key-on, engine-off — they should closely match.
- Inspect for vacuum leaks and check that the MAP sensor port isn't clogged.
- Inspect the MAP sensor connector and wiring for damage or corrosion.
- Check the air filter and intake duct for restriction.
- Test or replace the MAP sensor if readings are off; clear the code and road-test.
FAQ
Quick answers
Is it safe to drive with P0069?+
Short trips are usually fine, but poor fueling can cause hesitation or stalling. Get it diagnosed promptly to avoid being stranded.
Can I just clear P0069?+
It will reset once the ECM again sees MAP and barometric pressure disagree. Repair the sensor or leak first.
Related codes
Often seen with P0069
Read & clear P0069 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX