DTC Audi P1177 Short Explanation
Channel: Maxidot Audi
Date: 20/06/2020

The video focuses on the basic Audi 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

We will continue to work on improving the content.
Our efforts at Maxidot s.r.o.the video content gets better.


#maxidot #dtc #howto #diagnostictroublecode #audi


Make: 
Audi 
Code: 
P1177 
Definition: 
O2 Correction Behind Catalyst B2 Limit Attained 
Description: 
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinder head, the coolant temperature must be at least 80 degrees Celsius, and the oxygen sensor heater for oxygen sensor before the catalytic converter must be properly functioning. The ECM has detected a malfunction of the oxygen sensor. Note: Vacuum in the intake system sucks in the leak detection spray with false air. Leak detection spray decreases ignition quality of the fuel mixture. This causes a drop in engine speed and changes the value produced by the Heated Oxygen Sensor (HO2S). Note: Vehicle must be raised before connector for oxygen sensor is accessible. Note: The oxygen sensor before catalytic converter has a static regulation and can be differentiated from the oxygen sensor behind catalytic converter via a 6-pin connector. 
Cause: 
O2 sensor circuit has shorted to ground or B+
O2 sensor circuit is open
ECM has failed
O2 sensor has failed
Intake Manifold Runner Position Sensor is faulty
Intake system for leaks (false air) is faulty
Motor for intake flap is faulty