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Honda Fit/Jazz - DTC Troubleshooting: P0138 (63-2) (5MT)
Online Honda Fit/Jazz 2002-2005 Workshop repair manual used by professionals.
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Snip from the Manual
DTC Troubleshooting: P0138 (63-2)
DTC P0138 (63-2): Secondary HO2S(Sensor 2) Circuit High 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 secondary HO2S (Sensor 2) output voltage at 3,000 rpm (min-1) with the scan tool.
Does the voltage stay at 1.0 V or more?
YES - Go to 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the secondary HO2S (Sensor 2) and the at ECM/PCM.n
4.Turn the ignition switch OFF.
5.Disconnect the secondary HO2S (Sensor 2) 6P connector.
6.Connect secondary HO2S (Sensor 2) 6P connector terminals No. 1 and No. 2 with a jumper wire.
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7.Turn the ignition switch ON (II).
8.Check the secondary HO2S (Sensor 2) output voltage with the scan tool.
Is there 1.0 V or more?
YES - Go to 9.
NO - Replace the secondary HO2S (Sensor 2).n
9.Turn the ignition switch OFF.
10.Connect ECM/PCM connector terminalsE2 and E4 with a jumper wire.
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11.Turn the ignition switch ON (II).
12.Check the secondary HO2S (Sensor 2) output voltage with the scan tool.
Is there 1.0 V or more?
YES - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.n
NO - Repair open in the wire between the ECM/ PCM (E2, E4) and the secondary HO2S (Sensor 2).n
5. Disconnect