Cranky Prius

Published:  26 January, 2015

By Jim Gilmour

P0A0F - Engine Failed to Start

I asked him to go back in with the diagnostic tool and give me some high voltage battery data. The battery State of Charge (SOC) was down to just 18%, which is critically low; the normal SOC ranges between 30% and 80%.

The engine in the Prius is started by Motor Generator 1 (MG1) in the transmission. During start-up, the valve timing is adjusted so that the inlet valve is closed at 78° before TDC, this gives very light compression and with the throttle open, very little pumping losses on the induction stroke.

So now the mystery was solved, but the bad news was that the battery was very low on charge and our friend now had the job of diagnosing the non-start problem without too many chances to crank the engine.

Have you ever experienced something like this that you'd like to share, or have any comments?

Related Articles

  • DPF diagnosis guide 

  • Fifty shades of Carbon 

    Hoping to improve on my personal finances I decided to write something dirty this month, having written many times reflecting on problems associated with diesel combustion and its post combustion treatment failures. Also, I recall referring to the close similarities with direct petrol injection principles. When dealing with our diesel car owners, a process of profiling is adopted, the purpose of which is to fully understand three key facts:

  • Material friction 

    There are challenges facing the braking industry, especially changing legislations surrounding materials used within the pads. US legislation is calling for the removal of copper while a number of years ago asbestos was a common product in friction products.

  • Proof isn't always positive 

    By Andy Crook

  • The pros and cons of dash cams 

    By James Dillon


Search

Sign Up

For the latest news and updates from Aftermarket Magazine.


Poll

Where should the next Automechanika show be held?



Facebook


©DFA Media 1999-2016

Mentés