DTC Subaru C0033 Short Explanation
Channel: Maxidot Subaru
Date: 20/06/2020

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:
C0033
Definition:
Rear Air or Fuel Ratio (A or F) Sensor (Bank 1, Sensor 1) Heater Circuit Malfunction
Description:
The execution time is continuous and the duration time is 2 seconds or more.Engine running and battery at 10 volts or more.No return signal HIGH is detected when the PCM output duty is less than 2%.Return signal does not change when the PCM output duty is more than 20% and less than 80%.No return signal LOW is detected when the PCM output duty is more than 8%.NOTE: Before you troubleshoot,record all freeze data and any on-board snapshot.
Cause:
 Poor connections or loose terminals at the A or F sensor (Sensor 1),the relay and the PCM "Open" or Short" circuit between the A or F sensors,the relay box or the PCM Faulty A or F sensor (Sensor 1) Faulty PCM