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U067F Lost Communication With Barometric Pressure Sensor A

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

Barometric pressure sensor A is normally the ambient sensor that corrects fueling, boost targets and many diagnostics for altitude; CARB requires barometric pressure, measured or estimated, in the OBD data stream. U067F covers a digital version of that sensor whose messages stop arriving. GM's dual-throttle program 23OBDG07 does read a digital ambient sensor, but files its faults under P-codes: a CRC error or a short reported in message A sets P2228 or P2229, and defect or queue-full flags set P2227, each after 2 s with MIL in one trip. Ford's 2024 gasoline and 2023 diesel summaries keep sensor A analog (P2228). No published table therefore assigns U067F. Because ambient pressure may also be estimated, as CARB allows, drivability rarely suffers.

Likely causes

Data, supply or ground wire to the barometric sensor interrupted

Connector loose or corroded

Barometric sensor electronics failed

Symptoms

Check engine light
Slightly off fueling or boost at altitude
Other diagnostics may be suspended

Repair estimate

DifficultyEasyDIY possible

Parts and labour€40–300

Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

baro sensor avehicle bus wiring

References: gsi.ext.gm.com, fordservicecontent.com, law.cornell.edu.