2008 Prius. Twice now in 2 weeks, I have gotten the triangle of death at random times. Once, barely getting moving at an intersection and stopped quickly when the guy in front of me stopped. Triangle came on and the car shut down with the dash lit up. Tried to restart but everything was just lit up and/or blinking. Luckily I had my OBDII scanner with me. Only current DTC was P0A0D but had 6 readiness codes. P2610, P0125, P000A, P0172, P0171, P0300. Cleared the codes, and got on my merry way. This morning, it came on when I hit a bump turning into a parking lot. Didn't shut down. When I checked the codes, it was all the same codes as 2 weeks ago. Car is running normal otherwise. Any ideas why this is happening? Here's what the scanner reads: P0A0D - High voltage system interlock circuit high P2610 - ECM/PCM internal engine off timer performance P0300 - Random misfire detected P0171 - System too lean (Bank 1) P0172 - System too rich (Bank 1) P000A - Engine position system performance (Bank 1) P0125 - Insufficient coolant temp for closed loop fuel control Doesn't seem to make much sense to me. I did have the hybrid battery replaced less than 2 months ago (green bean). Could there be an issue with that? Been watching and the battery status has been great. Maybe a loose connection somewhere? Thanks in advance.
Those codes aren't all related to any one thing. They don't have to be; cars don't always have just one thing happen. Sometimes you just have to run down a list and start knocking them off. A P0A0D code coming and going intermittently catches my eye. That safety interlock circuit is dead simple, just one wire that runs from an ECU, through a few safety contacts beneath the inverter covers under the hood, back to the rear of the car, through an orange safety-plug handle on the battery, then to ground. If that circuit has continuity coming and going with bumps in the road ... well, I'd probably start by looking right near the battery, given the recent Green Bean work back there. If that didn't lead to some visibly obvious answer, then it just has to be poked at with a multimeter and there might turn out to be some damaged wiring or connectors somewhere. That might indirectly lead to some info on other codes too.
I saw some posts here and elsewhere about the orange service plug. The "lock" feels a bit loose, as in I'm not sure it was snapped in place correctly. I pulled it out, seems fine, reinstalled and I'll see if that makes a difference.
When you install the safety plug and you have the handle cocked back and you offer it up and then you flip the handle up and it's in the up position and standing tall you want to slam it down when you go to pull it down almost break your finger now push the buttons and do all the business and see if things start to work better Make absolutely certain you're 12 volt is 12 volts that means with an AGM battery in this day and age you're looking like 12 3 to 12 7 at rest with the car not ready the car not involved at all battery could just be sitting there on the floor If you're not maintaining something like that be suspect of your 12 volt immediately take it somewhere get it load tested by somebody that knows how to load test the battery without an algorithm A real load test turns things red hot or something Make certain you're 12 volt is up to the task usually lots of these communication hullabaloos or all about the 12 volt people will go round and round for 30 pages of responses and come back with yeah I went and had the 12 volt checked and it was no good exactly
12V battery is good (and new). replaced right before the HV was replaced. I'll see what it does now that I reinstalled the service plug correctly Ii think). May remove again and push harder on the lock (step 3 in pic above) just in case. Thanks!
Well it's obviously you have it in and working so we're trying to see maybe it's jumping up when you go over a bump I mean what's happening to make this thing shut off You're going over a speed bump in a parking lot too fast or what I mean you're like bunny hopping over speed humps thunk thunk and the thing codes and flashes between the two bumps or I mean you know have to be some pretty hard bumps to be making that go on or something is just loose like maybe the wires on the relays at the HD battery but you would think that would cause high heat and some other problems but you know I can't see under your battery from here and you can't see under the battery from there either because the case is on it so it may be getting hot in this problems going on who knows but certainly check connections because electrical connections just don't bounce loose generally speaking if they were connected properly when connected they should be able to take little bit of jumping over speed bumps I do it all the time in my generation too I don't slow down much for them in parking lots of about 5/8 mi an hour but I can hear my ratchets and sockets smack the top of the plastic tote that they're in
