Prius (2001-03) :: P3120 And P3125 With Subcodes Diagnosed
Mar 7, 2012
I bought my Prius after I tested the car around town and on the highway and went smoothly. I drove the car about 200 km after the warning came on board, high temperature and cold engine warning (red and blue). Stopped the car and I found nothing to be hot (engine or inverter).
I rebooted and the errors disappeared but reappeared and on the highway (120 km) car no longer accelerate, pedal did not respond.Stopped and restarted repeatedly trying to get as close to home and a Toyota service. High and low temperature have appeared and disappeared after stopped and restarted. Warnings appear together, none or only one of them.
But after 600 km appeared turtle on board and the car stopped. I was unable to start. They came from Toyota and were able to start with another auxiliary battery and ran 10 km with a tester on the dashboard (at full throttle and the car accelerated 1 km / sec until it reached 60 km / h then accelerated normal to 125km/h. When he put the foot on brake and after that tried to accelerate again the pedal was non responsive and the car stopped again and they towed it.
Next day they told me that the ECU is faulty (the one located behind the glove compartment) together with the Auxiliary Battery.(1100 Euro ECU).They told me that the temperature sensor is 200 degrees Celsius with a cold engine.
We towed the car to another service closer to home (1300 km) and asked a second opinion telling me that is defective inverter. I decided to buy an ECU. (220 Euro/ second hand)
Meanwhile my traction battery died after they tried to start the car many times.
After I charged the traction battery (one module at a time), whole battery shown after charging 301 V.
Now I have the following :
P3120 HV transaxle / Wire harness
INF. Code 249 (Open or +B short in motor temperature sensor)
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Working on a 2002 prius with 153k miles. bought it with a "Bad transmission" diagnosed by toyota dealer. Got I home and did a quick check but there were no codes. I drove it about 50 feet into my garage where it would shudder badly while being driven which from my experience sounds like a bad MG2 motor. Drained the oil and thought hhmmm th oil does not smell bad and neither did it look burned. Proceeded to pull the mg2 but found it looked brand new, no burned spots or any such thing. SO I put it back together and think its a bad invertor. put on a different invertor that I have lying in my garage that I "think" is good and start the car. get code p3125 and p3120 and still have the bad shuddering when i try to drive it..Is there any way to test it further before I pull the trans and put a new trans back in?
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2001 Prius (242,044 miles) with transaxle error code! Red triangle with exclamation mark, check engine light, PS error, Main battery error, and little red car with exclamation mark error. One week ago car gave random misfire codes with a burnt smell... could have been from my car or could have been a smell from the car next to me. Cleared codes and they never came back. This week I get the CODE OF TRANSMISSION DEATH the dreaded P3120 along with a 5 minute wait by the side of the road until I could restart it and drive the 5 miles back to the house. Cleared the code but it came back the next day with another total loss of power and another 5 minute wait on the side of the road.
After I turn off the car and wait a few minutes it will usually start back up and I can continue on my way... sometimes for a few miles and sometimes for 10 miles. My question is this... could this problem be something other than a bad transmission (transaxle) or should I be looking for a used transmission on ebay? I have also heard that it is possible that the MG2 might be bad and that it can be swapped out without pulling the motor so how can I test and confirm my real problem. I plan to repair myself one way or another... Other than all these warning codes and exclamation mark warnings symbols she drives great until she stops producing power and coasts to a total stop.
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I bought an 01 Prius with 148k miles. It had code P3125 which mean bad inverter. I replaced the inverter with one from a junk yard with 81k miles. As soon as I was done the car started right up, and I didnt get electrocuted!
Right after the car started I got codes P3115 P3001 and P 3191. I cleared them out and turned off the car for a min.
When I started the car again I got codes P3030 and P3001.
This car has an extensive service history, It has a new Cat and exhaust, a new accessory and HV traction battery that are less than 8 months old. Crank position sensor is new. fuel tank is new.
What could be causing the P3030 and the P3001?
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Car stalled and ran on battery only. Set code P3125, and depleted aux battery. So, I replaced the inverter and recharged aux battery.
Drove it 20-30 miles test driving it, when the MIL came on.
Drove home and found 2 codes set, 1st was set while driving, 2nd was set after parking.
P3000/123 - MPH=22 MG2.RPM=1280 SOC=65% Position=D
P3125/287 - MPH=1 SOC=60% Position=P
Any TSB on this issue?
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My Wife was driving our 2001 Prius and got the big triangle and the car went into limp mode.
The Codes were P3100 (info code 196) and P3125 (info code 325)
P3100/196 = Internal Error - Generator CPU Malfunction
3125/325 - Inverter Internal Short. - Generator Inverter Fin - Inverter Internal short
Clear the codes and the car runs fine, but the problem will eventually resurface.
The dealer wanted tor replace both the converter/inverter and HV ECU.
I purchased replacement converter/inverter from Ebay and inverter coolant pump (new) and installed.
Problem eventually resurfaced. I purchased replacement HV ECU from ebay and installed.
Engine would not start (does not attempt to even turn over), but was not throwing any codes. I had this same symptom with a third HV ECU as well. The part numbers on the HV ECU were exact matches.
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My 2002 Prius died the other day. Getting DTC P3125 when I ran it through my scanner, but I don't have an advanced enough one to get the sub-codes. It's got 215,000 Miles on it, so I would expect something major to be happening at this point.
Here's a detailed description of what happened --- I was driving down the freeway the other day and started noticing my car was sputtering a little bit and losing a slight amount of power. I pulled over to a restaurant to say hi to a friend; when I came back out I started the car and the check engine and battery lights came on. About 10 more miles down the freeway the car started heavily limping and barely was able to get me off the freeway, then the car completely died. When I would start it back up it would die in about 5 to 10 seconds. The 12v auxiliary battery, not the main hybrid battery, had completely died.
I figured it might have been just a dead old battery that needed replacement so I put in another new one. It ran amazingly for about five minutes around the parking lot, then the same thing happened again. It completely died just like before.
The 12v battery isn't getting re-supplied with the juice it needs. Something's wrong in there.
The either the inverter is shot, it's just overheating due to a faulty coolant pump, or the MG2 generator isn't putting juice back into the 12v system.
I checked the fluid reservoir. It looks like it's flowing, but there is a few bubbles floating to the top of the fluid. Is that normal?
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Pulling into parking lot and the triangle and exclamation light appear on dash. Drive about an additional hundred feet with what felt like lower power and no noises.
- Check 12V after about an hour and it reads 12.4 volts.
- Read codes and get P3125 sub code 325.
- Temperatures and HV battery numbers all looked good.
- Clear codes and immediately code comes back with no start, nothing. Did this many times.
This code and sub code lead to the inverter failing. Being that there was no noise as a MG2 stator failure this also leads to an inverter failure right as the MG1 motor starts the engine? Inverter pump still running good as it was recently replaced along with ATX fluid. Within the last two weeks two HV modules have been replaced.
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I have an '01 Prius with ~80,000 miles now. I bought it with a known brake issue, however upon further diagnosis, it appears the problem is with the Brake accumulator.
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I picked up a 2003 that had a bad AUX battery and P3130 code. Just FYI, aside from the battery it drives fine. Kicks the Warning light after about 15 miles but since the battery was bad it kept getting reset. Replaced the battery with a nice optima conversion.
Took out the inverter coolant pump, tested the circuit (good), tested the pump (bad). Replaced with a new one from dealer. Set up the bleeder tubes and massaged the lines till the new pump stopped SCREAMING at me. Added probably 2 qts of TLLC total. Bleeder tubes never had enough pressure to push fluid back up to reservoir but got solid 2 inches of fluid with no bubbles. Topped of the coolant. Went for a drive around the block, made it halfway (about 28mph) before the light kicked in and the motor seemed to bog down. Limped back home and read the 3125 Code. Code reader does not give me sub codes.
2003 Prius 154K miles on ODO.
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I have been posting about P3125 fault which is inhibiting ICE from starting. During this time I have been charging and also testing the traction battery so that I could continue to investigate the P3125 problem.
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2002... 184,000+ miles
I was driving the car and triangle popped up and engine would not shut off while parked (key on) I hooked up the non prius aware scanner (carry one with me at all times) and don't remember the code, but it was a "HV malfunction".
I didn't shut the car off to clear the code as I was not home and attempted to drive it home, meanwhile engine never shut off. I had to come to a complete stop at a red light and the car died. tried restarting it but nothing. so I pushed it off to the side of the road and cleared the code. Tried again and nothing. didn't start, nothing. it beeped and error code popped up. Checked the code and it was p3125.
I know there are subcodes but online it was leading to inverter. but I replaced the inverter last year with a re involt. I had the car towed to my job for $50, to have it towed home, would cost roughly $168. When I got it to work, I did the screen thing and checked the 12v battery and it was reading 10.9 I have been meaning to get a new one for about a year now so I did.
I purchased a new optima battery and installed it yesterday, cleared the codes, tried to start it and nothing. error code p3125. What leads me to believe that it may be a transaxle, well actually a Mg2 is when my inverter went bad, it would start then shudder and die then the triangle would pop up. this time around, it doesn't even start. I have an appointment with the dealership to get the code with subcode read on Tuesday 10/15 for $98.7.
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I have a 2001 Ford F250 truck -- it was stalling out (which was diagnosed as a faulty fuel pump), so I had the dang thing replaced. But nearly 6 months later, it's randomly stalling out again when I put it in reverse or stop at a light.
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My 2003 with 150K miles has had the blinking A/C light problem for the past year or so. I ran the diagnosis, got the 22 code, so it seems the clutch needs to be adjusted or replaced. If I leave the A/C on Max with the fan on at Max, the A/C works fine (for at least as long as my daily commute, about 40 mins). Once I turn the fan down or turn Max off, the lights start blinking within 5-10 minutes and the A/C doesn't work. Is this consistent with the clutch problem?
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A few months back, my wife (2007 Prius) was telling me that she had some stuff going on with it. I found the diagnostic test for the 12 v battery and it failed. So I replaced the 12v and everything was fine until about two weeks ago. Two weeks ago, she got a check engine light. Then she stopped the car and when she fired back up again, the light was extinguished. So, I figured no big deal. Yesterday, she went to leave and the car was lit up like a Christmas tree. So she took my truck to work and left me a note about this. She figured I would drive my garage queen Vette... but I chose to drive the Prius to see if I could figure out some things, which I did.
Here is everything that I noticed thus far:
First, I will start with lights. Brake System Warning light is on, Check engine malfunction indicator is on, Red triangle with exclamation point Master warning light is on, VSC Vehicle stability control system warning light is on. Then on the tv screen panel, the Hybrid system warning light is on. I ran down to O'Reilly's to see what codes it pulled, and this is what I have: C0200 Right VSS, C0205 Left VSS, C1259 Regenerative Malfunction, C1310 Malfunction H/V System, P1121 Coolant flow control, X2 Valve Sensor Circuit stack, P0A80 Replace Hybrid Battery Pack, P3015 Battery Block 5 Becomes Weak, P3016 Battery Block 6 becomes weak, and then a few more repeats.
What I have looked at and what I have noticed/experienced thus far; At the beginning of the day yesterday, when stopped at a light, the engine would turn on and then shut off frequently (approx every 20 seconds). A lot more than normal. As of today, the engine just stays on constantly... even after the battery indicator shows full, it stays running. The battery cooling fan stays running. Sometimes the car lacks power at start out, When slowing down, I tried selecting the "B" as I know that it would normally work as a trans brake and regenerate power, it doesn't seem to be doing that and it seems as though the tranny doesn't know exactly what to do. I checked the 12v battery again through the diagnostic and it says it was at 12.2v so that should be good. I noticed that the battery indicator will show full and then just drop down to one bar and then go back up to full and stay at full for a while. Lastly, I saw the inverter check and I did that by turning the car on (ready on) and I can see the fluid moving around and I can feel it in the tube and the fluid level is good.
It sounds to me as if the ECM/ECU may be bad. Or maybe the HV battery. I was leaning towards the ECM/ECU just because of all of the different fluctuations, but with electrical stuff, it could very well be the battery.
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Just used Carista to switch to a single beep when reversing. Whilst I was in the app, just out of curiosity, I checked for error codes. B1423 appeared. I didn't expect to see anything as the car is brand new.
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I have around 68k miles on my 2009 Prius and just got a CEL, the Red Triangle with an exclamation point, an intermittently occurring VSC light, and an intermittently occurring yellow circle with an exclamation point on the upper dash display. I also have a car shaped icon with an exclamation point on my main display (ICE?). My scan tool shows P0093 as the only code.
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I have a 2005 Prius with 98,000 miles on the clock, two weeks ago, the engine check light came on and I plugged in a "V-Checker OBD II reader.
Read the code P0420 and reset. Don't get bogged down regarding the P0420 code as this is just background to what happened next. The P0420 code has not come on again, reset was done last week.
Removed the OBD reader and noticed the VSC+ABS+Braking+Handbrake lights on, car drives OK, braking not quite what was, notice kind of "afterthought" when the brake pedal released. The Ready light does not come on, but the car starts fine and drives . I am sure the OBD reader caused the VCS etc problem, because there was no issues in that area until the OBD reader used, and in the minute or so of plugging it in, the VSC lights are on.
Code now present are C1203 and C1345.
Tried the Pin TC + CH pin procedures without success. Took to an independent Toyota Specialist, he did manage to clear the lights, but they came back on within half a mile during test drive. Could not clear lights after that. He recommended changing the 12V battery, which we did, but did not clear lights.
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I got red triangle and headlight icon on the screen. I hooked OBD and It gave me error code P1116, I checked all my front, back lights are working fine.
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Car was perfectly fine. Parked it in a parking spot, turned it off for a minute, started it back up, and BAM, Master Indicator Light is illuminated(not blinking), along with check engine light. (yellow, not blinking)
Code reader gives me these two codes: P0ac0 and P0afa
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Upon turning on my car and driving a few feet I had the Red Triangle of Death, Yellow VSC, Yellow (!) Indicator, and check engine light and I'm trying to figure out where I should start working on the issue.
The Codes were as Follows:
P3000 (subcode 123)
C0200
C1241
C1300
C1310
C1259
A little history:
About 3 months ago I had an issue with the hybrid battery and replaced a battery cell which stopped all issues. About 2 weeks ago I replaced the coolant inverter pump and until today there has been no errors, CELs, or any negative performance.
This is a Gen II, 2007 prius with almost 200k miles.
Unfortunately I had plans that I could not reschedule and made the drive to the location and drove back. I had serious battery drain and it was almost always at 1 bar of battery, sometime reaching up to 2 bars. There is also the sound of a fan coming from the back seat, which I assume is the HV Battery fan, but it is on regardless of if I have air conditioning or not. A/C is working fine. When I returned home the battery charged almost up to full bars, but when I came to a stop the battery drained in about 10 seconds leaving me with very low power to keep moving. After that whenever I slowed down the teal arrows showing a recharge of the battery were gone and the battery seemed to refuse to recharge.
Steps taken so far:
I topped off my engine coolant in the front reservoir as it seemed a little low, but I didn't add much before it was full. The other reservoir near the engine was just about full and taking off the other cap showed coolant filled to the top.
I tested the 12v battery with my voltmeter which came back reading 12.7.
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