2007 ISUZU KB P190 diagram

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Page 3473 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–195 
 
Action Taken When the DTC Sets 
• The control module activates the malfunction indicator lamp (MIL) on the second consecutive ignition cy

Page 3476 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–198 
 
• The rear fuel trim, long and short term, is more than a threshold.  
•  This DTC sets after the air flow coming into the engine accum

Page 3480 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–202 
 
Conditions for Setting the DTC 
Condition 1 
• The ECM detects that the front HO2S is operating too rich while the rear HO2S is operating

Page 3484 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–206 
 
• The engine is running. 
Conditions for Setting the DTC 
DTC P2227 
The ECM detects the BARO pressure changed greater than 5 kPa within

Page 3485 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–207 
 
Step Action  Yes 
No 
3 1  Switch off the ignition.  
2  Disconnect the BARO sensor wiring connector. 
3  Switch on the ignition with the e

Page 3488 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–210 
 
• The internal HO2S signal voltage switches at the same rate as the heater circuit. 
•  The above condition occurs 4 times out of 6 as

Page 3491 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–213 
 
Conditions for Clearing the DTC 
The HO2S pumping current control circuit DTCs are Type ‘B’ DTCs. Refer to 1.4  Diagnostic Trouble Code

Page 3494 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Management – V6 – Diagnostics Page 6C1-2–216 
 
• The ignition voltage is between 10.7 – 18.0 volts.  
•  The fuel system is in fuel shut-off mode.  
•  The calculated exhaust tem