Fault Family System: Powertrain (P-Codes) 17 SAE Codes

MAP Baro Correlation

Diagnostic & Technical Explanation

Code P0068 (MAP/MAF - Throttle Position Correlation) sets when the ECM cross-checks the manifold absolute pressure, barometric pressure, or mass airflow signals against each other (or against a related boost/turbo inlet pressure signal) and finds they disagree beyond the calibrated threshold. Causes include a vacuum/pressure line contaminated with oil or disconnected, a drifted or failing pressure sensor, or a restriction affecting only one of the compared signals.

These 17 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 17 times.

Codes in this family (17)

Code	Definition	Repair coverage
P0068	MAP/MAF - Throttle Position Correlation	3 ranked fixes
P0069	Manifold Absolute Pressure - Barometric Pressure Correlation	3 ranked fixes
P006A	MAP - Mass or Volume Air Flow Correlation Bank 1	3 ranked fixes
P006B	MAP - Exhaust Pressure Correlation	3 ranked fixes
P006C	MAP - Turbocharger/Supercharger Inlet Pressure Correlation	3 ranked fixes
P006D	Barometric Pressure - Turbocharger/Supercharger Inlet Pressure Correlation Bank 1	3 ranked fixes
P00B8	MAP - Mass or Volume Air Flow Correlation Bank 2	3 ranked fixes
P00C7	Intake Air Pressure Measurement System - Multiple Sensor Correlation Bank 1	3 ranked fixes
P00CF	Barometric Pressure - Turbocharger/Supercharger Boost Sensor A Correlation	3 ranked fixes
P00D0	Barometric Pressure - Turbocharger/Supercharger Boost Sensor B Correlation	3 ranked fixes
P00E6	Intake Air Pressure Measurement System - Multiple Sensor Correlation Bank 2	3 ranked fixes
P00F7	Barometric Pressure - Turbocharger/Supercharger Inlet Pressure Correlation Bank 2	3 ranked fixes
P023D	Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation	3 ranked fixes
P023E	Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor B Correlation	3 ranked fixes
P2073	Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Idle	3 ranked fixes
P2074	Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load	3 ranked fixes
P222F	Barometric Pressure Sensor A/B Correlation	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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