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Comments
OC on the temp indicates either a failed temp sensor (behind the grill. You can see it clipped to the radiator support) or a damaged wire/connector. The "OC" means "open circuit".
GM P0404
I mention to them my ebrake pedal failed to stay down and maybe it was emergency brake partially engaged? They said that would have nothing to do with it because emergency brake is mechanical and this is a differant issue? It was mentioned that maybe it is the ABS Central Control Unit....Big Bucks? Here is my question guys... Does anyone check anything out before just makeing statements? Is there no procedure to follow. Thanks for helping me out, I am a mechanic from the 50's..... Frank
Buy a good Stant thermostat and have it put in. Very simple job on this engine, takes about 10 minutes or so. Clear the codes (Autozone will sometimes let you do this yourself with their tool, but they cannot legally clear the code for you) and see what happens.
The symptom of this being the problem is the temp gauge never getting up near the 200d mark. On a Blazer, that would be just below the mid-point which is marked 210. Typically, in sub-50d weather the temp will hover around 150-160 which is too cool for this engine to run efficiently. Once corrected, you will probably see a slight bump up in your gas mileage. Both of mine did.
By the way, did the light first show up when the outside temps got colder?
Good luck,
Jim
Local tune-up place said that one sensor tripping could be triggering the other 2. They checked a couple things, confirmed the wiring and fuses were all good. They were getting to the point of guessing a main computer was failing, which I find hard to believe.
Autozone employee that pulled the codes for me when all three were first tripping mentioned it might be the sensor for airflow coming in that had gone bad. (This was in the middle of a couple different trips to tuneup place while they checked wiring and other basics for me.)
In the meantime I started down the list of basic things I had planned anyway with the high milage, focused on anything related to exhaust system. I ended up replacing spark plugs myself, which looked used, but no obvious problem. Had a muffler shop replace a section of dented exhaust pipe just downstream from Bank 1 sensor 1 o2 sensor. Pipe was dented enough to close off at least half the airway, looks like someone hit a big rock at high speed. Was starting to rust badly on kinked area. Had noticed it originally, hadn't realized how badly it was bent.
Now if I reset codes, all three codes trip in about two driving trips, plus apparently at least once I have had a p0420 code trip, which looks like it could be caused by o2 sensors, or Catalytic converter.
Any suggestions or tips on what to check next? I'm pretty sure I'm past the ability of my little oil change shop, but not excited about trying to find somewhere that is good at diagnostics. And the guesses I'm getting are all starting to be $200-300 parts, with little certainty.
My Blazer is a 2004.
Emissions related power train DTC's, Mode 3
Electronic Control Unit ID: 10
P0154- 02 Sensor circuit no activity detected (Bank 2 Sensor 1)
P0155- 02 Sensor heater circuit malfunction (Bank 2 Sensor 1)
P1153- Manufacturer specific code
Continuously Monitored Systems DTC's, Mode 7:
Electronic Control Unit ID: 10
P0155- 02 Sensor heater circuit malfunction (Bank 2 Sensor 1)
P1153- Manufacturer Specific Code...
Does anybody know what these mean? I am going crazy trying to understand what this is... somebody please help???
Thank you sooo much in advance...
Danielle
I recently replaced my TCC Solenoid in my 98 Blazer. It ran fine for a couple of days, and then my light came back on, and it is now having issues again. It feels like it doesn't want to pick up and shift into gear, but once it gets past about 40+ mph, it feels fine. All that I've read has be leaning me towards the ECT Sensor for the coolant, but I'm not sure.
Has anybody else had this issue and if so, can you please help me out!
BTW, I didn't start having these issues until my radiator busted and then I replaced it, then the TCC went out and now this issue.