For 1990-2009 cars

# MIL Service Soon Telltale On With DTC P0133 - O2S Slow Response

Subject: | (MIL) SERVICE SOON Telltale On with DTC P0133 - O2S SLOW RESPONSE 1 (Install PCM Calibration, If Necessary, and Install Oxygen Sensor). Due to the release of updated PCM calibration listed under Correction, this bulletin is being revised and supercedes bulletin 00-T-02A, which should be discarded.

Models: | 2000 Saturn S-Series vehicles

### Condition

Some customers may experience a SERVICE ENGINE SOON Telltale On with a DTC P0133 - O2S SLOW RESPONSE SENSOR 1.

### Cause

The response times (Lean to Rich, Rich to Lean) of a normally operating oxygen sensor may exceed the values set within the current powertrain control module (PCM) calibration or the oxygen sensor may be contaminated.

### Correction

1. Using a Scan tool, check the PCM calibration ID. Refer to the PCM Calibrations table on page 2 of this bulletin.

• | If DTC P0133 - Updated Calibration is installed, proceed to step 2.

• | If DTC P0133 - Updated Calibration is not installed, install new calibration and proceed to step 2. Refer to "Service Programming System (SPS)" in the Saturn Service Stall System (SSS) User Guide for reprogramming procedures.

2. Install new oxygen sensor. For oxygen sensor removal and installation procedures, refer to "Oxygen Sensor 1 (O2S-1)" in the Engine/Emission Control section of the 2000 S-Series Engine Service Manual.

PCM CALIBRATIONS (CALIBRATION ID)
2000 Model Year
Emissions | Engine | Transaxle | Calibration ID DTC P0133 - Updated
Federal (NF2) | DOHC (LL0) | Auto (MP7) | 21009140
| Man (MP3) | 21009144
| SOHC (L24 | Auto (MP6) | 21009143
| Man (MP2) | 21009147
California (NC1) | DOHC (LL0) | Auto (MP7) | 21009141
| Man (MP3) | 21009145
| SOHC (L24) | Auto (MP6) | 21009142
| Man (MP2) | 21009146

### Parts Information

PARTS REQUIREMENTS: | 21025117 | Sensor Asm -- Oxy (With Federal Emission System [NF2])
| 21022987 | Sensor Asm -- Oxy (With California Emission System [NC1])

### Claim Information

CLAIM INFORMATION: | To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System as follows:
When the oxygen sensor is replaced and the PCM is reprogrammed, the failed labor operation J6372 -- Replace Oxygen Sensor must be claimed with labor operation J6355 -- Reprogram EE Prom submitted as related line.
Case Type | Description | Labor Operation Code | Time
VW | EE PROM REPROGRAMMING | J6355 | 0.3
VW | SENSOR, OXYGEN REPLACE | J6372 | 0.2

Important: Refer to 1998-2000 S-Series Labor Time Guide for repairs not listed above.