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In the last few weeks, I get the dreaded Red Triangle with exclamation point on the dashboard with just the word "Problem" on the display. It only happens when I make a left turn and barely lasts one second (Just long enough to read the word "Problem"). It only happens (so far) on a mountain road where I'm going pretty fast, though hardly recklessly. Short hard turns are less likely to cause an alert than a longer sweeping turn.

It's only happened a few dozen times so I haven't been able to correlate it with braking or outside temperature. Amount of fuel doesn't affect the odds. Maybe there's a fluid sloshing, but I'd think the display would be informative if there's a dedicated sensor. My other thought is that there's some wiring that shorts out, which would at least explain a vague diagnosis display.
 

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Ours is doing that too. Every now and then the red triangle lights up and the screen says Problem. It goes away as fast as it comes. I took it to the dealer and they said the brake fluid was low and topped it off. It kept happening so I took it back. All I really got told was the brakes are fine and there were no codes. I'm waiting for a call back, but I'm also trying to find answers.

*** I finally checked the oil level myself. There wasn't any showing on the dipstick. I added the one quart we had and went to Valvoline. I drove it around for an hour or more myself after that and my husband has gone more than 70 more miles so far this morning and we haven't had any trouble. The dealer's check list shows that they checked the oil, but I'm having a hard time believing it.
 

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nice

last few weeks, I get the dreaded Red Triangle with exclamation point on the dashboard with just the word "Problem" on the display. It only happens when I make a left turn and barely lasts one second (Just long enough to read the word "Problem"). It only happens (so far) on a mountain road where I'm going pretty fast, though hardly recklessly. Short hard turns are l
 

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I had this exact problem with my 2007 Prius. Besides the triangle and the "problem" briefly on the display, while car was in garage for a couple days the battery in the back would drain also. Took it to dealer, and it functioned perfectly there. I finally figured out that I had kept my audio cable for my phone plugged in (in the storage area between the seats) for the last few weeks until I was going to the dealer, so I took it out. After I had paid the $180+ for the dealer's work, my husband checked that cable....showed a short. So, amazingly, a tiny little piece of cable, the part that went between the audio cable and my phone was draining the battery and setting off alerts.


In the last few weeks, I get the dreaded Red Triangle with exclamation point on the dashboard with just the word "Problem" on the display. It only happens when I make a left turn and barely lasts one second (Just long enough to read the word "Problem"). It only happens (so far) on a mountain road where I'm going pretty fast, though hardly recklessly. Short hard turns are less likely to cause an alert than a longer sweeping turn.

It's only happened a few dozen times so I haven't been able to correlate it with braking or outside temperature. Amount of fuel doesn't affect the odds. Maybe there's a fluid sloshing, but I'd think the display would be informative if there's a dedicated sensor. My other thought is that there's some wiring that shorts out, which would at least explain a vague diagnosis display.
 

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I’m having a problem with the red triangle too. I went to autozone to see if there were any codes and I didn’t have any but the o2 sensor, could that trigger a red triangle to pop up? The code is p0037
 

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I'm pretty sure that means low oil. You might want to make sure your Toyota Prius engine isn't leaking oil.
This is correct. It took us a LONG time to find out, and by then we were WAY low. It didn't trigger the little oil symbol until it was so low it was scary, but until then it triggered the red triangle and "problem" on the display repeatedly, especially in low speed left turns for some reason.
 

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Ours is doing that too. Every now and then the red triangle lights up and the screen says Problem. It goes away as fast as it comes. I took it to the dealer and they said the brake fluid was low and topped it off. It kept happening so I took it back. All I really got told was the brakes are fine and there were no codes. I'm waiting for a call back, but I'm also trying to find answers.

*** I finally checked the oil level myself. There wasn't any showing on the dipstick. I added the one quart we had and went to Valvoline. I drove it around for an hour or more myself after that and my husband has gone more than 70 more miles so far this morning and we haven't had any trouble. The dealer's check list shows that they checked the oil, but I'm having a hard time believing it.
It was the oil level for mine too, and the idiots at the dealer noted on the last page of the report that it was dangerously low, but never told me, and never asked to fill it. So, I drove another month with dangerously low oil before my husband checked it. Filling oil fixed problem.
 

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In the last few weeks, I get the dreaded Red Triangle with exclamation point on the dashboard with just the word "Problem" on the display. It only happens when I make a left turn and barely lasts one second (Just long enough to read the word "Problem"). It only happens (so far) on a mountain road where I'm going pretty fast, though hardly recklessly. Short hard turns are less likely to cause an alert than a longer sweeping turn.

It's only happened a few dozen times so I haven't been able to correlate it with braking or outside temperature. Amount of fuel doesn't affect the odds. Maybe there's a fluid sloshing, but I'd think the display would be informative if there's a dedicated sensor. My other thought is that there's some wiring that shorts out, which would at least explain a vague diagnosis display.
It's your oil. Check it; I bet it's low.
 

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I had this exact problem with my 2007 Prius. Besides the triangle and the "problem" briefly on the display, while car was in garage for a couple days the battery in the back would drain also. Took it to dealer, and it functioned perfectly there. I finally figured out that I had kept my audio cable for my phone plugged in (in the storage area between the seats) for the last few weeks until I was going to the dealer, so I took it out. After I had paid the $180+ for the dealer's work, my husband checked that cable....showed a short. So, amazingly, a tiny little piece of cable, the part that went between the audio cable and my phone was draining the battery and setting off alerts.
To add to this, it turned out to be TWO problems. The battery issue was the cable, but we continued having the triangle and "problem" on display every time we took a low speed left turn. THAT turned out to be VERY low oil, which the idiots at the Toyota dealer did notice but didn't tell us OR fix. They have had my car for all service since 2007, but never again.
 
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