Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (ENGINE CONTROL SYSTEM - 4.2L - DTC P0135 TO P0418)DTC P0136CONDITIONS FOR SETTING THE DTC
2006 Isuzu Ascender S, 5.3 M, 4WD
Conditions for Setting the DTC
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Conditions for Setting the DTC
WARNING: This page is about a different variant/trim than selected.
- The PCM detects that the HO2S 2 did not transition below 300 mV and above 750 mV during the passive test.
- One of the following tests fail:
Lean Intrusive Test
- The PCM detects that the HO2S 2 is more than 300 mV for 10 seconds.
- The HO2S 1 is less than 300 mV.
Rich Intrusive Test
- The PCM detects that the HO2S 2 is less than 750 mV for 10 seconds.
- The HO2S 1 is more than 600 mV.
- DTC P0136 sets within 13 minutes when the above conditions are met.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.