Service Engine Soon Light Illuminated with DTC P0135 or P0155 (Reprogram PCM)
| Subject: | Service Engine Soon Light Illuminated with DTC P0135 or P0155 (Reprogram PCM) |
| Models: | 2001 Chevrolet Express |
| 2001 GMC Savana |
| with 4.3L V-6 Engine (VIN W - RPO L35) |
| and California Emissions (RPO NC1) |
Condition
Some owners may comment on a Service Engine Soon (SES) Light/Message displayed. Upon investigation, the technician may find DTC P0135 or P0155 stored. Diagnosis may not identify the exact cause and the DTC(s) may not be duplicated.
Correction
If a vehicle is encountered with the condition described above and all of the diagnostic procedures listed in the applicable Service Manual have been performed with no resulting correction, use a Tech II scan tool to verify which software calibration is programmed into the vehicle's PCM. If the improved calibration, to enhance heated oxygen sensor diagnostics, has not been installed, reprogram the PCM with the updated calibration released on Techline TIS 2000 version 11 for 2003 that was sent to dealers in October 2003.
Warranty Information
For vehicles repaired under 8 year/80,000 mile emission warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J6353 | Module, Powertrain Control - Reprogram | 0.4 hr |
