MAP - Barometric Pressure Correlation
The P0069 code means the vehicle's onboard diagnostic system has detected: MAP - Barometric Pressure Correlation. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $350 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Poor engine performance at varying altitudes
- Reduced power output
- Rough idle or stalling
Probable Causes (Ranked by Likelihood)
- Faulty MAP sensor Very High
- Clogged or kinked MAP sensor vacuum line High
- Faulty barometric pressure sensor Moderate
- Intake manifold vacuum leak Moderate
Frequently Asked Questions
What does P0069 mean?
P0069 indicates a correlation error between the MAP sensor and barometric pressure sensor readings, meaning one or both sensors are providing inaccurate data.
What is the barometric pressure sensor?
Some vehicles have a separate barometric pressure sensor, while others use the MAP sensor to read barometric pressure at key-on before the engine starts. P0069 sets when these readings do not correlate.
How do I diagnose P0069?
Compare the MAP sensor reading at key-on engine-off to actual barometric pressure. Check the MAP sensor vacuum line for blockages and test both sensors with a scan tool.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Confirm P0069 and check MAP and BARO sensor readings
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Compare MAP sensor reading at key-on engine-off to barometric pressure
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Inspect MAP sensor vacuum line for blockages or leaks
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Test MAP and BARO sensor signals with scan tool
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2008-2018 Chevrolet Silverado
- 2010-2020 GMC Sierra
- 2007-2017 Dodge Ram 1500
- 2009-2019 Ford F-150
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