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U0611 Lost Communication With Intake Air Temperature Sensor 1 Bank 1

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

Intake air temperature is often no longer a separate NTC wire to the controller but a value inside a digital frame: combined air flow meters send it over LIN or SENT, and pressure chips such as Infineon's KP276 digitize an attached NTC and pass it on in the same SENT message. U0611 concerns sensor 1 of bank 1, typically the upstream sensor in the air filter or air flow path. GM documents it for a two-throttle calibration of 2023/2024, paired with U0613: it sets when the temperature message from the sensor upstream of throttle 1 stops arriving or its line reads as stuck high or stuck low; the MIL comes on after two trips. P0110 to P0114 are the analog circuit codes. Fuel and spark corrections then use a fixed substitute temperature.

Likely causes

Wiring fault to the combined sensor that carries the temperature value

Electronics of the combined air flow or pressure sensor failed

Corroded or loose connector in the intake path

Symptoms

Check engine light, on GM after two trips
Usually no noticeable change in driving

Repair estimate

DifficultyEasyDIY possible

Parts and labour€30–300

Time0.3–1 h

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

Parts involved

iat sensor 1 bank 1sensor wiring

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