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U0610 Lost Communication With Mass or Volume Air Flow Sensor B

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Air flow sensor B is the second meter on engines that measure each intake path separately, typically one per bank on V engines with two air boxes. In GM's documents 23OBDG07 and 24OBDG07, written for an engine with two throttle bodies, U060F stands for bank 1 and U0610 for bank 2: the code sets when the digital sensor itself reports a time overflow or a maximum-period violation for 1.5 s with battery voltage above 9 V, and the MIL follows on the second trip. Ford's 2024 gasoline summary is an exception, filing its digital air flow sensor B under U0612. P010A to P010E concern an analog sensor B, and P010F compares the two meters. Without sensor B the controller relies on sensor A and models for that bank.

Likely causes

Signal, supply or ground wire to air flow sensor B damaged

Air flow sensor B electronics failed or contaminated

Moisture or loose terminal at sensor B connector

Symptoms

Check engine light after the second trip on GM
Uneven running or slightly reduced power

Repair estimate

DifficultyMediumDIY possible

Parts and labour€40–400

Time0.3–1.5 h

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

Parts involved

maf sensor bsensor wiring

References: gsi.ext.gm.com, bosch-mobility.com, law.cornell.edu.