jeff schaffer

at 67,000 miles all of a sudden today my light came on, car is runnning great no problms other then the light, just had it smogged & oil changed all good checked the cap & changed from the locking cap i upgraded to, thought
that might help? nope still on... going to go by pepboys tom and have it cheecked out at least get a code from them any ideas guys?
jeff

Lucky

Get the codes then post them up here and we will be able to help you with your options.

jeff schaffer

P0700 ,P1818
transmision controlled system malfunction
jeff

Lucky

The p0700 code is just the trans controller telling the engine controller to turn on the check engine light. Normal to see when there is a trans code.

The p1818 code is tell us that the trans controller has seen the trans in gear with the shift lever in park or neutral.

This code can be set falsely. You can reset the codes and see if it comes back then go from there.
There is also a tsb from gm about a reflash for the trans controller. Here is the tsb.

#07-07-30-005C: 4T45 Transmission, MIL/SES On, DTC P1818, Power Door Locks, Cruise Control, Shift Interlock or Retractable Hardtop Inoperative, Engine Speed Revs Limited, Hybrids-Autostop Regen or Boost Inoperative - (Apr 8, 2009)


Subject: 4T45 Transmission, MIL/SES On, DTC P1818, Power Door Locks, Cruise Control, Shift Interlock or Retractable Hardtop Inoperative, Engine Speed Revs Limited, Hybrids-Autostop, Regen or Boost Inoperative (Reprogram TCM)


Models: 2006-2007 Chevrolet Cobalt, HHR

2007 Chevrolet Malibu

2006 Pontiac Pursuit (Canada)

2006-2007 Pontiac G6

2007 Pontiac G5

2007 Saturn AURA, ION, VUE, VUE Hybrid

with 4T45 Automatic Transmission (RPOs MN5, ME7)




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This bulletin is being revised to add the 2006 model year for Cobalt, Pursuit, G6, and HHR. Please discard Corporate Bulletin Number 07-07-30-005B (Section 07-Transmission/Transaxle).


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Condition
Some customers may comment on the illumination of the Malfunction Indicator Lamp (MIL) or the Service Engine Soon (SES) light, the power door locks, cruise control, shift interlock, retractable hardtop being inoperative and engine speed revs limited to 4,000 RPM in first gear after a cold start or cold soak with temperatures between 0° to 10°C (32°F to 50°F).

Customers with hybrid vehicles may also comment on the following conditions:

-- Hybrid Autostop, regen or boost inoperative

Cause
These conditions may be caused by the TCM setting a false DTC P1818 (Transmission Fluid Pressure (TFP) Valve Position Switch Indicates Drive without Drive Ratio).

Correction
Verify the conditions and reprogram the transmission control module (TCM) with the new updated calibration using the procedure below.

Check for DTCs.
Clear DTC P1818.
Start the engine.
Apply the brake pedal.
Place the transmission in reverse.
With a Tech 2®, monitor the transmission fluid pressure (TFP) switch parameter.
• If the TFP parameter indicates Reverse, reprogram the TCM with the updated calibration.

• If the TFP parameter indicates Park/Neutral, refer to DTC P1818 in SI for further diagnosis.

Important: Confirm the newest calibration includes the "false P1818 fix".

An updated TCM calibration is now available to address this concern. This calibration, or any that follow, is designed to address this concern. Reprogram the TCM with the software now available in the TIS2WEB using the Service Programming System (SPS).

If you cannot access the calibration, call the Techline Customer Support Center at 1-800-828-6860 (English) or 1-800-503-3222 (French) and it will be provided. As always, make sure your Tech 2® Diagnostic Scan Tool is updated with the latest software version.

Clear any codes and verify the condition has been fixed.

843de

Duplicated our efforts there Lucky, edited my post accordingly.

A P1818 code can also be triggered by shifting the transmission between Drive and Reverse without coming to a complete stop, did a tech or member of the testing station personnel operate your HHR Jeff?

I'd clear the codes and drive it for a bit to see if the codes reappear they may be spurious or related to the TSB that Lucky dug up.

ChevroletCustomerService

I'm very sorry to hear about your concern. If you would like further assistance on the issue, we would be happy to help. Could you please private message your name, address, phone number, VIN, and current mileage?

Thank you,

Jessica L.
Chevrolet Customer Care

jeff schaffer

one problem... i live in california not freezing temps is it still an issue?
called gm made a claim for assistence...
jeff

jeff schaffer

One of my buddies said to flush the trans. thoughly with synthethic fluids and see if the light goes off cost $150

donbrew

Where was there a mention of freezing temps in the TSB? Or, for that matter in the thread?

jeff schaffer

In the details of lucky's post read it...
am i wrong?
jeff