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Honda Fit/Jazz - DTC Troubleshooting: P0131 (1-1) (5MT)
Online Honda Fit/Jazz 2002-2005 Workshop repair manual used by professionals.
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Snip from the Manual
DTC Troubleshooting: P0131 (1-1)
DTC P0131 (1-1): Primary HO2S(Sensor 1) Circuit Low Voltage
1.Reset the ECM/PCM.
2.Start the engine. Hold the engine at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on.
3.Check the primary HO2S (Sensor 1) output voltage with the scan tool during acceleration using wide open throttle.
Does the voltage stay at 0.5 V or less?
YES - Go to 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the primary HO2S (Sensor 1) and at the ECM/PCM.n
Check the fuel pressure.
Is it