Honda 2004 Odyssey Service Manual page 433

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0137 '01 Model:
(Sensor 2) Circuit Low Voltage
1. Reset the PCM (see page 11-4).
2. Start the engine. Hold the engine at 3,000 rpm 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 with the scan tool or the HDS.
Does the voltage stay at 0.3 V or less?
YES Go to step 4.
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the secondary HO2S (Sensor 2) and the PCM.
4. Turn the ignition switch OFF.
5. Disconnect the secondary HO2S (Sensor 2) 4P
connector.
6. Turn the ignition switch ON (II).
7. Check the secondary HO2S (Sensor 2) output
voltage with the scan tool or the HDS.
Does the voltage stay at 0.3 V or less?
YES Go to step 8.
Replace the secondary HO2S (Sensor 2).
NO
8. Turn the ignition switch OFF.
9. Disconnect PCM connector E (31P).
11-124
Secondary HO2S
10. Check for continuity between secondary HO2S
(Sensor 2) 4P connector terminal No. 2 and body
ground.
SECONDARY HO2S
(SENSOR 2) 4P CONNECTOR
Terminal side of male terminals
Is there continuity?
YES Repair short in the wire between the PCM
(E18) and the secondary HO2S (Sensor 2).
NO Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
SHO2S (WHT/RED)