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Idle Fluctuation and/or the MIL Is On With DTC P1129 and/or P0505

Applies To: 2001–02 Odyssey – ALL, 2003 Odyssey – From VIN 5FNRL1...3B000001 thru 5FNRL1...3B159953, 2003 Odyssey – From VIN 2HKRL1...3H500001 thru 2HKRL1...3H514354, 2003 Pilot – From VIN 2HKYF1...3H500001 thru 2HKYF1...3H520648

Idle Fluctuation and/or the MIL Is On With DTC P1129 and/or P0505

SYMPTOM

The idle fluctuates, and/or the MIL is on with DTC P1129 (high manifold absolute pressure [MAP] sensor signal) and/or P0505 (faulty IAC valve).

PROBABLE CAUSE

The idle air control (IAC) valve sticks open, the power steering pressure switch wire is broken, or both.

CORRECTIVE ACTION

Replace the IAC valve, repair the power steering pressure switch wire, or do both.

REPAIR PROCEDURE A

1. Connect the HDS to the vehicle’s DLC.

2. Start the engine, and turn on the HDS.

3. When prompted, enter the VIN and the odometer reading.

4. From the System Selection Menu screen, select PGM-FI.

5. From the Mode Menu, select DATA LIST.

6. Scroll down the list to PSP SWITCH. Watch the reading in the Value column. ... Download File PDF

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