For 1990-2009 cars

# LNF, Intermittent MIL/SES Light Illuminated, DTCs P0335 and/or P2610 Set (Reprogram Engine Control Module (ECM))

Subject: | LNF, Intermittent MIL/SES Light Illuminated, DTCs P0335 and/or P2610 Set (Reprogram Engine Control Module (ECM))

Models: | 2008 Chevrolet Cobalt SS

| 2008 Pontiac Solstice GXP

| 2008 Saturn SKY Redline

| 2008 Opel GT

| 2008 Daewoo G2X

| with ECOTEC® 2.0L I-4 VVT DI Turbocharged Engine (VIN X -- RPO LNF)

### Condition

Some customers may comment on a intermittent Malfunction Indicator Lamp (MIL)/Service Engine Soon (SES) light illuminated with no engine performance concerns. Upon inspection, one or more of the following Diagnostic Trouble Codes (DTCs) will be stored in the ECM:

• | DTC P0335: Crankshaft Position (CKP) Sensor Circuit

• | DTC P2610: Control Module Ignition OFF Timer Performance

### Correction

If routine diagnosis using SI does not reveal any obvious cause, DO NOT replace the crankshaft sensor for DTC P0335 or replace the ECM for DTC P2610. Reprogram the ECM using the latest calibration if the above concern is encountered. A revised engine calibration has been developed to address these issues. Reprogram the ECM with an updated software calibration. This new service calibration is available on TIS2WEB using the Service Programming System (SPS). As always, make sure your Tech 2® is updated with the latest software version.

### Warranty Information

For vehicles repaired under warranty, use:

Labor Operation | Description | Labor Time
--- | --- | ---
J6354 | Powertrain Control Module -- Engine Reprogramming with SPS | Use Published Labor Operation Time