VIDEO

Informace

Chevrolet

Chevrolet P12BF

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

Chevrolet P12BF

Basic error definition

Cylinder 7 Injection Timing Retarded

Cause of DTC

Ambient air temperature is above -5° C (23° F). Fuel temperature is between 0-80° C (32-176° F). Engine temperature is greater the 50° C (122° F). Battery voltages is greater than 10 V. Time since last combustion event is between 10-30 s. Vehicle is in decel fuel shut off mode. Engine speed is between 950-1850 RPM. The difference between the Desired Fuel Rail Pressure and the Actual Fuel Rail Pressure is less than 2.2 MPa (320 psi). No gear change has occurred. Lambda sensors are adapted. Vehicle is not in 4WD (if equipped). Exhaust brake is not ON (if equipped). No other DTCs are present. The DTC runs when the above conditions exists.