Honda 2004 Odyssey Service Manual page 431

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0133: Primary HO2S (Sensor 1) Circuit
Slow Response
NOTE: If DTC P0131, P0132 and/or P0135 are stored at
the same time as DTC P0133, troubleshoot those DTCs
first, then recheck for DTC P0133.
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. Test-drive under these conditions:
• 55 mph (89 km/h) steady speed
• Transmission in D4 position
• Until a readiness code is set, or Temporary DTC
P0133 is set
4. Check for a Temporary DTC with the scan tool or
the HDS.
Is T emporary DT C P0133 indicated?
YES Replace the primary HO2S (Sensor 1).
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at the
primary HO2S (Sensor 1) and the PCM.
11-122