07 Prius Will Not Run

Did you mess around with the orange traction battery interlock located on the left side of the traction battery?

When the interlock is inserted, you pivot the lever 90 degrees, then slide it down to lock in place.

If the interlock is correctly installed and the car still does not run, get Mini VCI so that you can retrieve the DTC logged by the hybrid vehicle ECU. The two codes that you listed were logged by the skid control ECU and basically indicate the hybrid vehicle ECU has a problem.

 

Hm I thought those codes 3 error codes c1259 , c1310 were repeater codes. Put out by the breaking system and the traction skid control system when the main battery was not functioning properly. Are you sure there wasn’t another code? One that indicated your hybrid high voltage traction battery was malfunctioning?


iPhone ?

 

Oh, I see Patrick has got you straightened out


iPhone ?

 

DTC P0125 means that the engine temperature is not increasing as it should, as the engine is warming up from a cold start. Make sure the engine coolant in the radiator is full. If it is, then the engine thermostat may be open, or the engine temp sensor has failed.

That fault code will not prevent the engine from running, so your car probably has logged additional DTC unknown to you.

Look on amazon.com and you will see many suppliers of illegal devices. You need to decide if you want a US supplier or one from China. Obviously shipping from China will take a bit longer, although I have found their air delivery is quite fast. Most of the delay occurs once the shipment arrives in Los Angeles and then has to get through the US Mail system.

You also have to decide what version level you want. The newer versions will cost more. Use a laptop running Windows 7 or Windows XP, 32 bit OS.

[Moderators note: we cannot allow the promotion of illegal diagnostic tools on PriusChat. It is a really fast was to get the site sued and shut down. All references to such devices will be removed.]

 

Before you purchase another cable, we will try to get your existing cable working first

 

Have you tried to install/reinstall the the software/driver already?

What kind of issues are you having?

After installing the driver (and after plugging the cable into your computer), run the Driver Utility it will tell you if the computer recognizes the cable or not.

 

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The observation of "running 15 seconds" just means that MG1 is spinning the engine. The engine did not actually start, and the proof of that is if you depress the accelerator pedal while the engine is spinning, its speed will not increase. Each time you do this, you are draining the traction battery a little more.

This is what I would do:

1. Remove the engine air cleaner housing. Clean the throttle body interior and throttle plate. Use a clean rag with throttle body cleaner sprayed on it, and scrub out the throttle body interior as well as the throttle plate. Rotate the throttle plate 90 degrees to get inside the throttle body.
Do not drown the throttle body in cleaner (which is contrary to the instructions you will probably find on the can.) I use Q-tips and 91% isopropyl alcohol to clean the throttle body interior.
What does the engine air filter look like on the bottom? If you cannot see light pass through the filter, discard it and install a new filter.
2. Remove the mass air flow sensor from the air cleaner housing, and clean the MAF sensor using MAF spray cleaner. The amber bulb should be clean, not grey. The two little wires should be clean. Do not actually touch the wires with anything other than cleaner spray.
Do not use throttle body cleaner (which has lubricant in it) because that will attract dust on the MAF sensor. Reinstall the MAF sensor. Reinstall the air cleaner housing. Make sure the clamp at the bottom of the housing to the throttle body is tight. Make sure that the PCV hoses are correctly positioned on the throttle body.
3. Make sure you have at least 3 gallons of fuel in the fuel tank.
4. Make sure the 12V battery is fully-charged. It doesn't matter if it is new. Today, did you put a charger on it to make sure it is fully-charged? If not, do so overnight and let the battery charge up while you are working on 1-3 above.
5. Try once to start the engine. If it doesn't start, there are three more things you can try:
6. Figure out how to hook up a fuel pressure gauge to the fuel line, which will require you to rig up appropriate fittings. See if the fuel pressure is at least 43 psi when you make the Prius IG-ON (you do not have to actually try to start the engine.)
7. Inspect the wiring to the camshaft position sensor and crankshaft position sensor.
8. Replace the engine ECU which is hiding behind the glove compartment. Forget about trying to reflash the ECU using MiniVCI. If you don't have a real licensed copy of Techstream, do not try to do anything other than retrieve DTC.
9. If 1-8 fail, tow the car to your local Toyota dealer for assistance.

Good luck.

 

You could try using starting fluid. Just don't get any on the MAF sensor.

No point in buying a new ECM when you can buy used ones so cheaply on eBay. Just make sure the part number of the used unit is the same or higher than the currently installed ECM.

 

Clear all the codes via TIS so the next attempt to start the engine will log fresh codes. Please post them here.

Your running out of start attempts.

What kind of maintenance have you done to the car?How many miles since you bought it?
Have you ever run it so low on engine oil it threw a red triangle?

Why did you put A new hybrid battery in it?