DTC Subaru B1402 Short Explanation
Channel: Maxidot Subaru
Date: 2020-06-20

The video focuses on the basic Subaru specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make:
Subaru
Code:
B1402
Definition:
O2 (B2 S1) Circuit Insufficient Activity
Description:
Engine started,vehicle driven with the throttle open at a speed over 18-55 mph at light engine load for over 5 minutes,ECT Sensor more than 170ºF,and the PCM detected the O2 signal switched from 0.39v to 0.60v too few times in the Oxygen Sensor Monitor test.
Cause:
Base engine mechanical fault affecting more than one cylinderExhaust leak present in exhaust manifold or exhaust pipesO2 element fuel contamination or has deterioratedO2 signal circuit or ground circuit has high resistance