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Hey everyone I’m having a really frustrating problem with my GS460. Two weeks ago one day out of no where my car didn’t want to crank at all. I pulled the codes and got P0102(MAF circuit low) P0113(IAT circuit input high) and P0335(Crank Position Sensor A Circuit). The live data showed that the IAT was much hotter than outside temperate, and also showed that air was moving through the MAF sensor even though the engine was cold and not even running. I bought a OEM crankshaft position sensor, installed it and it didn’t fix it. I bought a OEM MAF sensor from Japan installed it and it fired right up, the codes cleared up by themselves after some driving. But three days later when I went to start it, the same thing happened, doesn’t want to start and it’s giving the same codes. The live data is acting weird just like last time however now the catalyst temperature sensor( O2 sensors) says they’re over 1000 degrees Fahrenheit with a cold motor. I will include photos of the codes and live data for reference. I also have a sound system installed, don’t know if that has anything to do with my problem. Any help would be greatly appreciated, I don’t want to give up on this car I want to keep her for a lifetime! The engine is cold, and not running! Engine is cold, hasn’t been started at all.
I would have the battery tested, or try a different one. A bad cell or low battery about to go out can cause weird ECU issues.
You've replaced both sensors with oem parts so that is probably not the issue.
There is a common denominator - if you look at the diagnostic procedures you will notice that all the wiring for those sensors run to the same ecu plug.
My guess is if it's not the battery you have a wiring harness short, or the ecu has a malfunction.
You mentioned it came back after changing the MAF, i would jiggle those wires around to see if it came back to life again.
I would have the battery tested, or try a different one. A bad cell or low battery about to go out can cause weird ECU issues.
You've replaced both sensors with oem parts so that is probably not the issue.
There is a common denominator - if you look at the diagnostic procedures you will notice that all the wiring for those sensors run to the same ecu plug.
My guess is if it's not the battery you have a wiring harness short, or the ecu has a malfunction.
You mentioned it came back after changing the MAF, i would jiggle those wires around to see if it came back to life again.
Thank you for taking time out of your day to help me, I will try to fix it when I have time. I will keep you all updated.
08’ GS460 not starting
