EP3 CPLEngine Management Light

[JoniBlaze]

Can anyone help with this. It appeared after jump starting someones car, my car wasn't running and keys may have been in the ignition....big mistake

Anyway, The code was PO171 - System too lean bank 1.

At the time it had a re-flashed K100 ECU from CPL on it. This made the car horrendous to drive, symptoms of a sticking throttle body, kangarooing at low revs and poor fuel economy.

After a few days the EML fault light disappeared from the dash which has not been helpful in diagnosing the problem. Despite this I have now swapped out the K100 ECU with the re flash on it for a spare ECU I have, the fault has not returned.

Identifying this is right pain...Could I have spiked the re-flashed K100 ECU perhaps? Blown Front oxygen sensor?

Thx in advance

 

[Loxy]

What's the code when you read it? Not a lot of info in your post. What where you doing when it came on, what mileage are you at, serviced regularly? etc.

 

[nosman]

As Loxy says, you need to plug it into a ODB2 reader and read the codes as the engine managment light covers about 200 different things so could be anything.