Engine Code 25
#1
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Engine Code 25
Lean condition if I researched it right. Some say O2 sensors but which ones? Should I just replace all 4 to be safe or do 2 then reset ECU?
#5
Lexus Test Driver
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A resistance check can tell you the resistance of the heater circuit, but that's not the whole story.
The full test involves accessing the OBD-like connector in the engine compartment, jumpering two pins together, and measuring the voltage at various engine RPM conditions. All spelled out in the manual. And I think there's at least one typo in the manual.
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