SYSTEM DIAGRAM
Precaution
Problem Symptoms TableCatalyst System Efficiency Below Threshold (Bank 1) (P0420)
MONITOR DESCRIPTION
The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter
(TWC) to monitor its efficiency.
The first sensor, the air fuel ratio sensor, sends pre-catalyst information to
the ECM. The second sensor, the heat ...
VIN not Programmed or Mismatch - ECM / PCM (P0630)
MONITOR DESCRIPTION
DTC P0630 is stored when the Vehicle Identification Number (VIN) is not stored
in the Engine Control Module (ECM) or the input VIN is not accurate. Input the VIN
with the Techstream.
DTC No.
DTC Detection Conditi ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuator and other items to be read without removing any parts. This non-intrusive
inspection can be very useful beca ...