EML P0125 - Solution?

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ChrisR1984

EML P0125 - Solution?

Post by ChrisR1984 »

Hi guys, i got a P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control) i'm assuming its because i put too much water in the coolant tank...

i cleared it last night, took it for a drive and seemed fine but it came back on this morning.


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ChrisR1984

Re: EML P0125 - Solution?

Post by ChrisR1984 »

it was the coolant which had too much liquid in it, but i noticed that i now get a P0155 error code..

any ideas as to the cause of this one?

(i just took out the pre-cats)
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ZZW30

Re: EML P0125 - Solution?

Post by ZZW30 »

http://www.obd-codes.com/p0155

02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
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ChrisR1984

Re: EML P0125 - Solution?

Post by ChrisR1984 »

i managed to fix it, it wasnt plugged in propperly lol :laughing

bret whitcombe
Posts: 1
Joined: 16/09/19 20:58

Re: EML P0125 - Solution?

Post by bret whitcombe »

Hi all,

This is a long shot, as this thread is so old. I have the P0125 error, but my coolant level is fine, in fact it’s just below the Max line. Car drives like a dream, but not sure what to check now and don’t want to cause any damage.

Anyone have any ideas? TIA

Bret

belgarum
Posts: 1
Joined: 11/07/16 19:11

Re: EML P0125 - Solution?

Post by belgarum »

I had EML on and code P0125. Replaced the Engine Coolant Temperature sensor but the fault code returned.
The car was running fine, temperature gauge functioning normally, fan cutting in when required, coolant level normal.
Took it to Toyotatech in Guildford who found lambda sensor (bank 2 sensor 1 - upper left) reading low. Replaced this and reset the EML, all seems fine now.
Over about 5 years I had replaced all 3 lambda sensor as they took it in turns to fail, but they each returned the correct code to identify them so I wasn't expecting P0125 to be lambda-related.
Bought a Denso sensor this time on the advice of Toyotatech. Beware: the one I got from Eurocarparts had a wire not really long enough for Bank 2 Sensor 1 (the shortest of the 3 - I had to reroute the socket) it certainly would NOT fit Bank 1 Sensor 1. It's only 230mm, the one it replaced was at least 100mm longer.

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