DTC Mazda B129D Short Explanation
Channel: Maxidot Mazda
Date: 26/06/2020

The video focuses on the basic Mazda 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:
Mazda
Code:
B129D
Definition:
APP Sensor No. 1 Circuit Plausibility Or Signal Voltage Too High Or Too Low
Description:
Ignition on. If the APP Sensor No. 1 and No. 2 signals do not agree (plausibility) or if Sensor No. 1 voltage signal is above 4.8v (too high) or below 0.29v (too low), this DTC will set
Cause:
APP Sensor has failedAPP Sensor No.1 5v supply circuit is open,shorted to ground,to voltage,or shorted to Sensor groundAPP Sensor ground circuit or signal circuit is openIntermittent conditionAPP Sensor signal circuit is shorted to the Sensor ground circuitECM has failed