hybrid system malfunction. engine not kick in

[hc167]

hi bwilson4web:

I agree with what you said. but why is unrelated codes appeared at the same time? for example, why is there a keyless entry code there? anyway, I understand your point. but I believe if there is a problem, then the code will come up again. I will buy a scanner and do it myself. I generally do not 100% believe those dealer. especially when they hire those young guys to work on my car. And I do think that toyota is a good car with good hardware. I just don't trust on their software.

anyway, maybe I should mention one more thing, that check engine light came on when I reset the service maintenance light without changing oil two days ago. I did that because my last oil change I used mobile 1 and the condition of the oil is still good. Please don't tell me that this will bring up the check engine light.

[Patrick Wong]

Without knowing what the DTC are, how can you assert they are unrelated? For example, a problem with the DC to DC converter could cause the voltage on the 12V bus to sag. This would cause DTC to be logged by various ECUs which might not appear to be directly related to each other.

If the check engine light is coming on, then the engine ECU is logging DTC. However, without a list of the DTC, it is hard to say whether your problem is as simple as a loose gas cap, or an ignition misfire, or a bad catalytic converter, or failed variable intake valve timing, or a bad engine coolant heat recovery system, or ??

Hence, it would be wise to ask your dealer tech to carefully record all retrieved DTC and enter them upon your service invoice, so that you have a record for future reference.

You can buy an OBD-II code reader. I suggest that you ensure that it is compatible with the Toyota communications protocol. Even if compatible, it may or may not pick up the DTC logged by the various Prius ECUs.

[richard schumacher]

Or even as simple as the 12V battery being low. Is this the original 12V battery? Have you ever drained the 12V battery by leaving a door or the hatch open, or the lights on?

[hc167]

I have never drained the battery. but the dealership that I purchased did. This is the car that I purchased used last year. and when I tested drive the car, they actually needed to jump start the car. anyway, I will need a scanner with me. I do not really trust the dealer. Not that because they do not have the knowledge. but they never want to do a good job on my car (I should say anyone's car). and for a small problem. they keep telling you that this entire thing need to be replaced. I will ask my friend about my car check engine light issue. he can access alldata. So maybe I can find some information there. yes, you are all correct. they maybe related issue.

[hc167]

yes, it is the original battery

[hc167]

my check engine light is on again today and I sent it to dealer. They did a quick scan and only found one code this time. I did not ask them the code but they said it is the generator sensors. so they will need me to drop off the car for about one day.

[statultra]

if you buy a scanner make sure it supports CAN protocol.

if anything happens again it should be covered under warranty instead of being erased by the dealer, if you send it back ask for a printout of the diagnostic check.