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Acura DTC

Acura DTC P2252

Manufacture

Acura DTC

Code

P2252

Definition

Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) VS Circuit Low Voltage

Description

With engine running the VSB1 terminal voltage is 0.3 V or less, and the IPB1 terminal voltage is 1 V or more, for at least 5 seconds after the sensor becomes active, 85 seconds before the sensor becomes active.

Cause

  • Poor connections or loose terminals at the A F sensor (Sensor 1) and the PCMShort circuit between the PCM and the A F sensor (Sensor 1)Faulty A F sensor (Sensor 1)PCM may need to be updated with the latest softwareFaulty PCM

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