Engine Controls - Engine Stumble/DTC P0139 (O2 Sensor): Overview

Group
36 - ENGINE ELECTRICAL

Number
03-36-019

Date
08-2003

Model
Sonata 1999-2000

Subject

1999-2002 SONATA 2.4L ECM
REPROGRAMMING FOR ENGINE HESITATION
IN THE MORNING AND DIAGNOSTIC TROUBLE
CODE P0139

This TSB updates TSB 02-36-037, to include information on the correct reprogramming adaptor connector for 1999 & 2000 Model Year cars.

DESCRIPTION:

This bulletin describes how to reprogram the ECM (Engine Control Module) in the 1999-2002 SONATA 2.4L I4 using the Hi-Scan Pro.

The SONATA I4 reprogramming affects the following:

^ Infrequent minor engine hesitation after an initial cold start (typically the first start in the morning).

^ DTC P0139 (02 Sensor Circuit Slow Response (Bank 1, Sensor 2)) check engine light illumination diagnosis revised. If this code is set and the rear 02 sensor is diagnosed to be functioning normally, perform this ECM reprogramming procedure.

VEHICLES AFFECTED:

^ Model: 1999-2002 Model Year (MY) SONATA with 2.4L DOHC engine

^ Affected vehicle production date range: Produced through July 7, 2002 Affected VIN range: Produced through KMHWF25532A713157








ECM SPECIFICATIONS:

ECM REPROGRAMMING PROCEDURE:
CAUTIONS BEFORE REPROGRAMMING:

1. Conduct reprogramming with the ignition key in the ON position.

2. Be careful not to disconnect the Hi-Scan Pro cables during reprogramming.

WARNING
If reprogramming is interrupted, the manual update procedure must be used.

3. Do not start the engine during reprogramming.

4. Do not turn the ignition key OFF during reprogramming.

5. When the reprogramming is completed, turn the ignition key OFF For 20 seconds before starting the engine.

EXPLANATION OF ERROR MESSAGE:

1. "INVALID PASSWORD" : Please enter the exact password again.

2. "REPROGRAMMING ERROR, PLEASE WAIT FOR RETRY" An error occurred during reprogramming, the Hi-Scan Pro will retry reprogramming automatically.

3. "ALREADY REPROGRAMMED" or "INCORRECT TARGET ID": This reprogramming has previously been done on this vehicle or the ECM is not the type subject to this reprogramming procedure.

4. "COMMUNICATION ERROR, PLEASE CHECK THE SYSTEM" In this case, you must reprogram manually after selecting menu option "02: EF 2.4D 99/00MY [ERROR MODE]" OR "02. EF 2.4D 01/02MY [ERROR MODE]"





WARRANTY INFORMATION: