VIDEO

Informace

Acura

Acura P2251

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit
Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

Acura P2251

Basic error definition

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

Cause of DTC

With engine running the VSB1 terminal voltage is 6 V or more, and the PCM internal signal voltage is 4.6 V or more, for at least 5 seconds. The execution time is continuous and DTCs P0135, P2195, P2237, P2238, P2243, P2245, P2252, P2627, P2628 are not active. NOTE: If DTC P2251 is stored at the same time as DTC P0134, troubleshoot DTC P2251 first, then recheck for P0134.