Index Isuzu Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross - service repair manual 1999-2002 year
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6E2–211 RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS Diagnostic Aids Check for the following conditions: D Heated oxygen sensor wiring – The sensor pigtail may D Poor PCM to engine grounds. D Fuel pressure – A condition which causes a lean Fuel System Diagnosis. D Lean injector(s) – Perform “Injector Balance Test”. D Vacuum leaks – Check for disconnected or damaged D Exhaust leaks – An exhaust leak may cause outside air D MAF sensor – The system can go lean if the MAF measurement that is not correct. Disconnect the MAF D Fuel contamination – Water, even in small amounts, Fuel System Diagnosis for the procedure to check for fuel contamination. D If none of above conditions are present, replace the Test Description Number(s) below refer to the step number(s) on the condition described in the “Diagnostic Aids” above. DTC P0157 – HO2S Circuit Low Voltage Bank 2 Sensor 2
Step Action Value(s) Yes No 1 Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Install the Tech 2. under “Conditions for Setting the DTC” criteria 4. Using a Tech 2, monitor Bank 2 HO2S 2 voltage. Does the Bank 2 HO2S 2 voltage remain below the 22 mV Go to Step 4 Go to Step 3 3 1. Ignition “ON”, engine “OFF”. note parameters. 3. Operate the vehicle within Failure Records conditions as noted. 4. Using a Tech 2, monitor “DTC” info for DTC P0157 until the DTC P0157 test runs. 5. Note the test result. Does the Tech 2 indicate DTC P0157 failed this — Go to Step 4 Refer to Diagnostic Aids 4 1. Turn the ignition “OFF”. circuits for a short to ground or a short to the heater Were Bank 2 HO2S 2 signal circuits shorted? — Go to Step 5 Go to Step 6 5 Repair the Bank 1 HO2S 2 signal circuit. Is the action complete? — Verify repair — |