For 1990-2009 cars

# Engine Hesitation and/or Vehicle Lacks Power with DTC P0326 Knock Sensor System Performance Set

Subject: | Engine Hesitation and/or Vehicle Lacks Power with DTC P0326 Knock Sensor System Performance Set (Install PCM Calibration)

Models: | 2000 - 2002 Saturn S-Series vehicles equipped with manual transaxles (MP2/MP3) built up to and including VIN 2Z258983 or automatic transaxles (MP6/MP7) built up to and including VIN 2Z263777.

### Condition

Some customers may comment about the engine lacking power when accelerating and/or engine hesitation while driving.

### Cause

This condition may be caused by the PCM misinterpreting normal engine noise/vibration as spark knock resulting in unnecessary ignition timing retard.

### Correction

To correct this condition continue with procedure in this bulletin.

### Procedure

1. Connect Scan Tool to the vehicle.
2. Navigate to the 1.9L (LLO for DOHC, L24 for SOHC) Powertrain Menu.
3. Select ID INFORMATION.
4. Select CALIBRATION ID.
5. Read CALIBRATION ID.

• | If PCM calibration ID number is listed below, reprogram the PCM with the latest calibration. For reprogramming procedures refer to the "Service Programming System (SPS)" in the Saturn Service Stall System (SSS) User Guide.

• | If PCM calibration ID number is not listed below, do not reprogram the PCM. The PCM already has the correct calibration installed to correct this condition. Refer to the diagnostic procedure for DTC P0326 located in the Engine/Emission Controls section of the 2000-2002 S-Series Engine Service Manual.

#### Calibration IDs with Potential for Subject Condition

21009140 | 21009141 | 21009142 | 21009143
21009144 | 21009145 | 21009146 | 21009147
21009148 | 21009149 | 21009201 | 21009202
21009203 | 21009204 | 21009205 | 21009206
21009256 | 21009257 | 21009258 | 21009259
21009272 | 21009273 | 21009274 | 21009275

### Warranty Information

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for J6355 (EE PROM Reprogramming). If another procedure is performed, refer to the appropriate Electronic Labor Time Guide for the correct Labor Operation Code and Time. When another procedure is performed that requires EE PROM Reprogramming, J6355 must be claimed as a "related line" to that repair.