Camry XLE Sedan L4-2164cc 2.2L DOHC (5S-FE) MFI (1999)
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DETECTING CONDITIONS
HINT:
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When the DTC P0171 is recorded, the actual air-fuel ratio is on the lean side. When DTC P0172 is recorded, the actual air-fuel ratio is on the
rich side.
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If the vehicle runs out of fuel, the air-fuel ratio is lean and DTC P0171 is recorded. The MIL then comes on.
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If the total of the short-term fuel trim value and long-term fuel trim value is within ± 38%, the system is functioning normally.
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The A/F sensor output voltage and the short-term fuel trim value can be read using the OBD II scan tool or TOYOTA hand-held tester.
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The ECM controls the voltage of AF(+) and AF(-) terminals of ECM to the fixed voltage. Therefore, it is impossible to confirm the A/F sensor
output voltage without OBD II scan tool or TOYOTA hand-held tester.
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OBD II scan tool (excluding TOYOTA hand-held tester) displays the one fifth of the A/F sensor output voltage which is displayed on the
TOYOTA hand-held tester.
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