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#1
08-15-2007, 02:34 AM
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92 Cutlass service engine soon light code 26
My 1992 Cutlass Cruiser 3.3L SES light turns on intermittently when I drive above 35-40 mph. The scanner reads code 26. Had replaced TCC solenoid and tranmission oil pressure switch. However, it didn't fix the problem. A new ECM didn't fix the problem either. Does anyone have any idea?
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#2
08-15-2007, 04:50 AM
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Re: 92 Cutlass service engine soon light code 26
When the ECM is not turning "ON" the circuit being controlled, there should be 12 volts present on the fault line. If 12 volts is not present due to an open or shorted control circuit, or an open component coil. a failure will be logged in memory.
There are several things that can fail and set of a code 26. If it is an EGR problem, it will also set off a code 32. QDM SYMPTOMS: Cooling fans inoperative. Poor driveability due to 100% canister purge. Coolant light "ON" all the time, "OFF" during bulb check. EGR inoperative - CODE 32 TCC Inoperative. also, keep in mind that the computer can all components can be good, but if a WIRE is bad, it can set a code.
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#3
08-16-2007, 02:45 AM
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Re: 92 Cutlass service engine soon light code 26
Two transmission shops scanned my car PCM today. One shop took the car out for a test drive. This was what they told me.
At 45mph, the TCC solenoid was activated. However, the torque converter was inoperative. Their recommendation was to replace the torque converter ($5-600). Now I am wondering if I have a bad torque converter or just have a bad wire. Logically, the ECM senses the vehicle speed or engine rpm at 40mph, sends a voltage to activate the new TCC solenoid to lock up the torque converter. However, the torque converter is defective, it fails to lock up. Somehow the ECM figures out that the torque converter is not working and return a code 26. I don't know if this is an electrical problem, a torque converter problem or some other problem. What else can I do to pinpoint the problem? The other transmission shop just told me that it was not the torque converter and they could not help me. My car used to give me 27 mpg. Now I am only getting 20 mpg. I have been driving the car with this problem for more than one year. The car is reliable, runs and shifts smoothly with no incidence. Instead of spending $500 to fix an intermittent SES light, I am inclined not to do anything about it.
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