Come discuss the technical ins and outs of the 2010, 2011, 2012, 2013, 2014, & 2015 3rd Generation Toyota Prius and the Hybrid Synergy Drive System. Tue, 14 Apr 2026 05:22:17 +0000 Tue, 14 Apr 2026 05:22:17 +0000 PriusChat https://priuschat.com/forum/gen-3-prius-technical-discussion.94/ Tue, 14 Apr 2026 04:52:36 +0000 https://priuschat.com/threads/can-i-bleed-the-stroke-simulator-without-starting-linear-valve-offset.259675/ https://priuschat.com/threads/can-i-bleed-the-stroke-simulator-without-starting-linear-valve-offset.259675/ invalid@example.com (jzs175) jzs175 I replaced only the brake booster pump and now I want to make sure there is no air left in the system. (sometimes I hear sounds near the brake pedal that seem like air in the system).

In Techstream, the only place I found that bleeds this part is Utility - ABS actuator has been replaced. But after that, Techstream wants to run Linear Valve Offset.

Can I press EXIT when Techstream asks to start the valve calibration, and will that end the procedure safely without...

Can I bleed the stroke simulator without starting Linear Valve Offset?]]> 8 Thu, 09 Apr 2026 18:47:13 +0000 https://priuschat.com/threads/libsu-redesigning-the-battery-support-unit-to-support-lithium.249158/ https://priuschat.com/threads/libsu-redesigning-the-battery-support-unit-to-support-lithium.249158/ invalid@example.com (mudder) mudder 1: I apologize in advance for any incorrect vernacular specific to the Prius. I'm a (passionate) G1 Honda Insight owner, who prior to today had never been inside a Gen3 Prius. Prior to last night I'd never even studied the wiring diagram... so I'm bound to get some terms wrong.

2: I designed and sell a replacement computer that allows the G1 Honda Insight to safely use modern lithium traction batteries. My long term vision is to eventually offer a similar computer for...

LiBSU - Redesigning the "Battery Support Unit" to Support Lithium]]> 122 Sun, 05 Apr 2026 00:36:16 +0000 https://priuschat.com/threads/spark-plug-gap-lets-think-about-this.212718/ https://priuschat.com/threads/spark-plug-gap-lets-think-about-this.212718/ invalid@example.com (Nor'easter) Nor'easter
The factory gap on these is pretty big at 0.044" or so, and this leads to a dumb question from a long time shade tree wrench and new-to-Prius guy...

Given the incidence of cold start misfires on this engine, why aren't we running these plugs at something like 0.032 - 0.035"? Anyone got a good reason not to do this?]]> 30 Sat, 04 Apr 2026 15:52:28 +0000 https://priuschat.com/threads/compression-leak-down-test-advise.248231/ https://priuschat.com/threads/compression-leak-down-test-advise.248231/ invalid@example.com (bobby515) bobby515 thinking guy's could be correct. have a defective egr, valve..broke. inside. have an oem comming.
driven the car 10k since last june. no code's no oil or coolant loss.
thinking the rumble on take off could be the head gasket.
test equiment i have .
cam scope coming today.
head leakdown tester coming today...
had regular compression tester.
i still think it's the EGR..car has alot of power 202k on it.
poor mileage..was getting 50 now for awhile 37..off and on it's good...

Compression leak down test advise]]> 15 Thu, 02 Apr 2026 19:58:07 +0000 https://priuschat.com/threads/gen-3-engine-swap-confusion.259498/ https://priuschat.com/threads/gen-3-engine-swap-confusion.259498/ invalid@example.com (Tbic) Tbic
Gen 3 engine swap confusion.]]> 2 Tue, 31 Mar 2026 02:31:20 +0000 https://priuschat.com/threads/denso-sc16hr11-or-the-denso-4711-ixeh20tt-spark-plugs.259481/ https://priuschat.com/threads/denso-sc16hr11-or-the-denso-4711-ixeh20tt-spark-plugs.259481/ invalid@example.com (Markee) Markee Does the Denso 4711 IXEH20TT officially replace the SC16HR11 as the go to plugs for the Gen3 Prius ?]]> 4 Thu, 26 Mar 2026 13:05:18 +0000 https://priuschat.com/threads/selling-a-slightly-used-hybrid-battery.259301/ https://priuschat.com/threads/selling-a-slightly-used-hybrid-battery.259301/ invalid@example.com (DeeB) DeeB I'm new here so I may not be posting in the right place, so forgive me if that is the case. I recently replaced the hybrid battery in my 2010 Prius (probably in 2023 or 24). The car had about 170,000 miles on it and was otherwise in good shape, so I sprung for the $4000 cost. Now the rear axle rusted through and a wheel broke off making it un-driveable. I also just bought 2 new tires for it in Jan/Feb 2026. How do I recoup some of the money I paid for these things? I'm sure there is a...

Selling a slightly used hybrid battery]]> 16 Tue, 24 Mar 2026 22:10:25 +0000 https://priuschat.com/threads/what-part-number-should-i-be-using-to-purchase-brake-booster-assembly.259405/ https://priuschat.com/threads/what-part-number-should-i-be-using-to-purchase-brake-booster-assembly.259405/ invalid@example.com (Tabitha) Tabitha
Im fairly mechanically inclined so i watched some videos and said i think i can tackle this. The only part that is confusing to me as that toyota lists the...

What part number should i be using to purchase brake booster assembly]]> 6 Tue, 24 Mar 2026 19:20:30 +0000 https://priuschat.com/threads/p0012-vvt-solenoid-no-voltage.251796/ https://priuschat.com/threads/p0012-vvt-solenoid-no-voltage.251796/ invalid@example.com (Elecgenius) Elecgenius
I have an issue with a P0012. I replaced the Camshaft Position Sensor and the wiring harness since it was faulty, had a bad cable. I also replaced the VVT solenoid twice and the wiring harness as well since it also had a faulty wire. The issue is I get ground, but the yellow wire gets no voltage. I also tried checking the voltage while the plug was connected to the VVT solenoid and no go.

Is there another sensor that activates or is there a sensor that would tell the ECU not to send...

P0012 VVT Solenoid no Voltage]]> 5 Mon, 23 Mar 2026 15:43:43 +0000 https://priuschat.com/threads/cannot-complete-replacement-brake-booster-air-bleed-procedure.257697/ https://priuschat.com/threads/cannot-complete-replacement-brake-booster-air-bleed-procedure.257697/ invalid@example.com (George Jung) George Jung I replaced the master cylinder and abs accumulator a few months ago and have not been able to do the bleed procedure.
I bought a 50 amp charger, im reading 14 volts when i try to start the procedure and its still not working.
I got the vxdiag cable. I was trying to use it with techstream 18, Ive now signed up for the toyota two day subscription ands its still not working
I also have a code for steering...

Cannot complete replacement brake booster air bleed procedure]]> 38 Thu, 19 Mar 2026 21:57:02 +0000 https://priuschat.com/threads/how-to-remove-left-rear-abs-sensor.254598/ https://priuschat.com/threads/how-to-remove-left-rear-abs-sensor.254598/ invalid@example.com (Darryl Trimm) Darryl Trimm
How to remove Left Rear ABS Sensor]]> 5 Wed, 18 Mar 2026 20:13:51 +0000 https://priuschat.com/threads/techstream-old-driver.259369/ https://priuschat.com/threads/techstream-old-driver.259369/ invalid@example.com (Rich Fife) Rich Fife
I just did a new XP install on an old airgapped laptop (Dell Vostro 1510) and am about to install techstream, but I remember there was on out of date driver (USB?) you had to install instead of the most recent one. Which one is that?]]> Wed, 04 Mar 2026 22:18:09 +0000 https://priuschat.com/threads/rear-abs-sensor-fault-after-replacing-wheel-hub-assembly.259178/ https://priuschat.com/threads/rear-abs-sensor-fault-after-replacing-wheel-hub-assembly.259178/ invalid@example.com (tonymats) tonymats
ABS
Part # suffix: 47214
Calibration ID: F152647214
Fault codes:
C1466 Rear Speed Sensor RH Circuit

I do not see any damage in the wiring that plugs into the sensor. Plugging out and back in didn't help either.

Since the sensor itself is embedded in the wheel hub, would the most likely explanation that the wheel hub is defective?

It's a Mevotech part ordered from...

Rear ABS sensor fault after replacing wheel hub assembly]]> 22 Tue, 03 Mar 2026 04:45:15 +0000 https://priuschat.com/threads/150k-miles-hv-battery-condition.257246/ https://priuschat.com/threads/150k-miles-hv-battery-condition.257246/ invalid@example.com (howardc64) howardc64 Summary : Pretty Good Condition. Maybe Mild Climate Related?

Just tested our 150k mile 2011's HV battery (original). Condition is pretty good. I wonder how much it has to do with our mild climate (Seattle) and car is nearly always garage parked (stay at home mom's car, not work transportation vehicle potentially parking outdoors all day) Mostly shorter around town hilly trips. A couple of longer interstate drives.

Most of the failures I read about seems usually from hot climates....

150k miles HV battery condition]]> 3 Mon, 02 Mar 2026 16:02:54 +0000 https://priuschat.com/threads/how-does-the-prius-charge-its-12v-battery.100491/ https://priuschat.com/threads/how-does-the-prius-charge-its-12v-battery.100491/ invalid@example.com (Mopar) Mopar
Or it seems possible there could be some windings in one of the MG units in combination with a voltage regulator that does this. Am I even close?

I am the new owner of a 2011 Prius and I am trying to figure how some systems of the car works.

Thanks for any help,

Roger]]> 9 Tue, 24 Feb 2026 00:35:30 +0000 https://priuschat.com/threads/2013-p0a80-error-permanent.219353/ https://priuschat.com/threads/2013-p0a80-error-permanent.219353/ invalid@example.com (Q*bertZ) Q*bertZ This error P0A80 comes back every couple times I drive the car. I have taken the battery apart and cleaned all the terminals. checked the voltages and "balanced" the cells. I'm getting 51 to 64 mpg on my trips. the car has 232000 miles on it. Am I looking at having to get new cells? when the error comes back I cannot select EV, ECO, or Power mode and the arrows for the energy monitors do not work until I start the car a second...

2013 P0A80 error "permanent"]]> 22 Sun, 22 Feb 2026 02:25:27 +0000 https://priuschat.com/threads/techstream-key-fob-programming-%E2%80%93-step-by-step-with-pics.215529/ https://priuschat.com/threads/techstream-key-fob-programming-%E2%80%93-step-by-step-with-pics.215529/ invalid@example.com (Prius_Gnome) Prius_Gnome
Introduction:
For Gen2, you can program a key fob using the chicken dance. Google it if you don't know what I'm talking about.

Starting with Gen3, there is no chicken dance....

Techstream Key Fob Programming – Step by Step with pics]]> 57 Wed, 18 Feb 2026 22:06:14 +0000 https://priuschat.com/threads/unable-to-connect-to-emissions-test-computers.259027/ https://priuschat.com/threads/unable-to-connect-to-emissions-test-computers.259027/ invalid@example.com (Striker_) Striker_
Unable to connect to emissions test computers]]> 4 Mon, 16 Feb 2026 16:44:27 +0000 https://priuschat.com/threads/replacement-shocks-and-struts-question.259024/ https://priuschat.com/threads/replacement-shocks-and-struts-question.259024/ invalid@example.com (MattDKC) MattDKC
I have a 2013 Prius Persona edition. I inherited it from a parent 6 years ago, and while not a fan at first, I love it now and it refuses to die.
I have 143k miles on it and the shocks/ struts need to be replaced (I believe they are the originals).
I have a great local mobile mechanic that has done work on it and he has the rare option of me supplying my own parts when he works on my cars.

He has given me a labor quote of $250 to $312 to do the job.

If I get the parts from him...

Replacement Shocks and Struts question]]> 2 Sat, 14 Feb 2026 21:50:32 +0000 https://priuschat.com/threads/p0a40-p0a41-refuses-to-move.221437/ https://priuschat.com/threads/p0a40-p0a41-refuses-to-move.221437/ invalid@example.com (EV_mode) EV_mode
So I found a 2010 that is very clean, really too clean however it refuses to move forward or backwards. I can shift it into what ever gear I want starts up and runs fine aside from an occasional surge. The oil and coolant also look good. The previous owner says it was...

P0A40 P0A41 refuses to move]]> 15