I have a 2010 carolla with just shy of 100k miles.
yesterday afternoon My dashboard greeted me with a flurry of activity. The ABS, Brake, airbag, and power steering lights were all on. Also, the RPM gauge and speedometer we unresponsive and stayed at zero. Finally the left side dash display would not display any information. It would cycle through the various options (time, active mpg, average mpg, time, etc) but only one option (temperature) worked.
I took it to autozone and they hooked up a voltmeter type (large) device to the battery and diagnosed it as the alternator. So I took it to a mechanic who concurred and replaced it.
However, upon picking the car up the same lights were still on. So the mechanic took it back into the shop and ran some more diagnostics then came back saying it wasn’t throwing any codes but the lights won’t go off. Based on this they are saying it’s the PCM (power control module). But after I turned it back on again, now the check engine light is on (in addition to the others). Brought this up with the mechanic but insisted it was still likely the PCM.
I couldn’t find any mentions of PCM issues when searching this site.
Has anyone run into this before? My concern is that we’re not actually sure it’s the PCM, and if it is then I’m also wondering if the alternator was fine and misdiagnosed due to the faulty PCM.
Any advice is welcomed. Thanks!
yesterday afternoon My dashboard greeted me with a flurry of activity. The ABS, Brake, airbag, and power steering lights were all on. Also, the RPM gauge and speedometer we unresponsive and stayed at zero. Finally the left side dash display would not display any information. It would cycle through the various options (time, active mpg, average mpg, time, etc) but only one option (temperature) worked.
I took it to autozone and they hooked up a voltmeter type (large) device to the battery and diagnosed it as the alternator. So I took it to a mechanic who concurred and replaced it.
However, upon picking the car up the same lights were still on. So the mechanic took it back into the shop and ran some more diagnostics then came back saying it wasn’t throwing any codes but the lights won’t go off. Based on this they are saying it’s the PCM (power control module). But after I turned it back on again, now the check engine light is on (in addition to the others). Brought this up with the mechanic but insisted it was still likely the PCM.
I couldn’t find any mentions of PCM issues when searching this site.
Has anyone run into this before? My concern is that we’re not actually sure it’s the PCM, and if it is then I’m also wondering if the alternator was fine and misdiagnosed due to the faulty PCM.
Any advice is welcomed. Thanks!