EXsoccer1921

iTrader: (14)

So, my car was in and out of the dealer that past couple days (gave them the car to order parts, took car back, dropped car back off to install parts) for some interior work and then to take care of a CEL--P0128 coolant thermostat not getting the engine up to running temperature somethin or other

Well, when i took it in to the dealer to get looked at it was actually the second time for that code to be thrown. The first time i just checked the coolant and made sure there was enough and since it came on when it was lik 20* i figured it was nothing so i had them clear it and i checked the DIC often after that and the temp was fine. Well when the CEL came on a second time, had it scanned-same code and i didn't have them clear it, i just took it to the dealer.

So, apparently it was fixed cause it didn't happen for a few days, and then just friday night i was driving and it came on again. so i had it scanned. again it was P0128... THE THIRD TIME!!! And it just got back from the dealer who was suppose to fix it. i made sure they didn't clear it this time either. But i'm forced to wait till tomorrow to take it to them since they aren't open on the weekend. But today when i started the car and drove for a little bit, i noticed the CEL was not on anymore. but aren't they supposed to stay on until cleared?/

Cliffs notes: CEL comes on for the first time, P0128 scanned and cleared at autozone. CEL comes on again, scanned at autozone P0128. taken to dealer to be fixed. car comes back from dealer and two days later the CEL comes back on, scanned at autozone again, P0128. cannot be taken to dealer for another two days. when car is started on day2 the CEL is no longer there.

Cobaltss/TC

Just get your thermostat replaced and the code will never come back on

EXsoccer1921

iTrader: (14)

well the weird thing is that when i took it in they said it wasn't the thermostat. and that it was something in the ECU that needed to be reprogrammed. but in anycase. i'm gonna take it back monday and tell them what happened, cause the code will still be in the history. and tell them to fix it...again.

Cobaltss/TC

well i have seen that bulletin i thought it was just for the 2.2 and 2.4

EXsoccer1921

iTrader: (14)

link?

Cobaltss/TC

yeah it is for only the 2.2, so i would say it is a thermostat



#05-06-04-073: Check Engine Light (MIL) Illuminated, Usually without Driveability Symptoms, DTCs P0128, P0604, P0326, P0420, P0717, P2431 Set on L61 Engine (Follow SI-If Necessary, Reprogram ECM with New Calibration - (Dec 7, 2005)


Subject: Check Engine Light (MIL) Illuminated, Usually without Driveability Symptoms, DTCs P0128, P0604, P0326, P0420, P0717, P2431 Set on L61 Engine (Follow SI, and If Necessary, Reprogram Engine Control Module (ECM) with New Service Calibration)


Models: 2006 Chevrolet Cobalt, HHR

2006 Pontiac Pursuit (Canada Only)

2006 Saturn ION

with Ecotec 2.2L 4-Cylinder Engine (VIN D, F -- RPO L61)

Built Prior to Following VIN Breakpoints:




--------------------------------------------------------------------------------
Model
VIN Breakpoint

Chevrolet Cobalt
67707283

Chevrolet HHR
6S559494

Pontiac Pursuit (Canada Only)
67707283

Saturn ION
6Z152773


Condition
Some customers may comment that the " Check Engine Light" malfunction indicator lamp (MIL) is illuminated. Technicians may find the following DTCs may have set false failures. Typically, the vehicle will exhibit no driveability symptoms, only the MIL with one or more of the above mentioned DTCs.

The following are the DTC descriptors and the description of the false failure concern:

• DTC P0128 Engine Coolant Temperature (ECT) below thermostat regulating temperature -- The DTC may set due to a calibrated time parameter or under extremely cold conditions.

• DTC P0604 ECM Random Access Memory (RAM) -- The DTC may set under low voltage conditions.

• DTC P0326 Knock Sensor (KS) Performance -- The KS signal indicates an engine knock is present and the ECM command spark retard at a given engine load and speed is more than the calibrated value.


Important: A new catalyst may fail this test within the first 200 miles of operation due to out-gassing of the internal matting. If this occurs, operate the vehicle at highway speeds for approximately 1 hour, then retest.


• DTC P0420 Catalyst System Low Efficiency -- The ECM has determined the catalyst efficiency has degraded below a calibrated threshold. The ECM may prematurely diagnose a catalyst failure before the catalyst has been allowed to run hot enough for a sufficient amount of time to burn off manufacturing coatings inside the converter. These coatings adversely affect the catalyst efficiency and the O2 sensor performance.

• DTC P0717 Input Speed Sensor Circuit Low Voltage -- The transmission turbine speed sensor may set due to a calibrated rpm and time parameter. This fault may set falsely, especially if the engine is stalled and the vehicle is moving, or if the key is cycled on-off-on while the vehicle is moving.

• DTC P2431 Secondary Air Injection System Pressure Sensor A Circuit Range/Performance -- The control module determines that the difference between the AIR pressure sensor and the barometric pressure (BARO) sensor signals is greater than 10 kPa when the AIR pump is commanded OFF or the control module determines that the difference between the AIR pressure sensor and the BARO sensor signals is greater than 50 kPa when the AIR pump is commanded ON. The DTC may set due to the ignition key ON and the engine OFF but the engine is still turning.

Cause
Engineering has identified a concern with the ECM software.

Correction
Important: The vehicle may or may not exhibit any driveability symptoms. If there are any driveability symptoms along with any DTCs mentioned in this bulletin, DO NOT reprogram the ECM. Follow Service Information (SI) first.

Reprogram the ECM with the latest calibrations if the above concerns are encountered. An updated ECM calibration is now available to address this concern. This calibration, or any that follow, is designed to address this concern. Refer to Service Programming System (SPS) using the appropriate Service Information (SI) procedures. The new ECM calibrations will be available to dealerships as part of TIS2000 incremental satellite update version 12, which was broadcast to dealers on 11/28/2005. For the dealerships that use CDs, they were mailed on 12/07/2005. As always, make sure your Tech 2Ž is updated with the latest software version.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J6354
Module, Powertrain Control - Engine Reprogramming
Use Published Labor Operation Time

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

EXsoccer1921

iTrader: (14)

hmm interesting

hallss

i had this same thing happen on my 08 ss i didn't have time to get it flashed before it went off???

06blackSC

The MIL light will turn itself off after It has gone through and passed the self test on that particular monitor after so many tries. The code will still be stored in the system however. It just moves from "current" to "history"

Sound like you have a temperamental (pun intended) thermostat.

EXsoccer1921

iTrader: (14)

.....you didn't see the date did you....

06blackSC

WTF. I hate back from the dead posts.

EXsoccer1921

iTrader: (14)

blame hallss hahah

sport08

x2 i was just about to post this and then saw the bak from the dead post