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12 Posts
I bought a cruze at auction, that was lightly hit in the front. It had some engine codes, one was related to the upper purge solenoid, which was replaced. The thermostat was cracked and that was replaced.
After we filled it the first time, we found that the water pump was leaking. So that was replaced. It seemed to be OK then started overheating again, but would just do it after about 20min of driving, then be fine after that. A different mechanic did a compression test on the cooling system and found a crack in the upper cooling line dischage pipe (another plastic), so that was replaced.
But, the mechanic put full strength dexcool in, instead of mixing it. He said it was no biggie.
Now i'm getting a P0420 code while driving. I noticed the engine temp gauge is barely over 1/4 most of the time. I'm seen other posts mention the gauge normally sits just below 1/2 normally (is this correct?) Could the engine be running too cool, or the full strength coolant causing misreads of temp causing exhaust mixture /catalyst issues? I can clear the code, and drive for a while. It kinds comes back randomly.
Also, I'm getting a P0300 code in the mornings with rough idle. On my scanner, I can get into the ECM and show misfires, and there are none. If I clear the code, the engine idles normal. Is that weird?
Why does this code also cause about 10 other codes in ABS, Stbil, HVAC, SRS, etc. Seems dumb.
So, on this one I'm leaning towards that valve cover crack I havent seen yet (caused by accident). Would the valve cover also cause p0420?
GEN1, 1.4L, 2014 LT
After we filled it the first time, we found that the water pump was leaking. So that was replaced. It seemed to be OK then started overheating again, but would just do it after about 20min of driving, then be fine after that. A different mechanic did a compression test on the cooling system and found a crack in the upper cooling line dischage pipe (another plastic), so that was replaced.
But, the mechanic put full strength dexcool in, instead of mixing it. He said it was no biggie.
Now i'm getting a P0420 code while driving. I noticed the engine temp gauge is barely over 1/4 most of the time. I'm seen other posts mention the gauge normally sits just below 1/2 normally (is this correct?) Could the engine be running too cool, or the full strength coolant causing misreads of temp causing exhaust mixture /catalyst issues? I can clear the code, and drive for a while. It kinds comes back randomly.
Also, I'm getting a P0300 code in the mornings with rough idle. On my scanner, I can get into the ECM and show misfires, and there are none. If I clear the code, the engine idles normal. Is that weird?
Why does this code also cause about 10 other codes in ABS, Stbil, HVAC, SRS, etc. Seems dumb.
So, on this one I'm leaning towards that valve cover crack I havent seen yet (caused by accident). Would the valve cover also cause p0420?
GEN1, 1.4L, 2014 LT