Honda 2004 Odyssey Service Manual page 410

DTC P1128: MAP Sensor Signal Lower Than
Expected
1. Turn the ignition switch ON (II).
2. Check the MAP with the scan tool or the HDS.
Is 54.1 kPa ( 406 mmHg, 16.0 in.Hg), 1.6 V , or
higher indicated?
YES Intermittent failure, system is OK at this
time.
NO Replace the MAP sensor.
DTC P1129: MAP Sensor Signal Higher Than
Expected
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle.
2. Check the MAP with the scan tool or the HDS.
Is 43.3 kPa ( 325 mmHg, 12.8 in.Hg), 1.4 V , or less
indicated?
YES Intermittent failure, system is OK at this
time.
NO Replace the MAP sensor.
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