Negative Fuel Trim - Car Talk (2)

Negative Fuel Trim - Car Talk (2) - Nairaland

Nairaland Forum › Nairaland General › Car Talk › Negative Fuel Trim (7310 Views)

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Re: Negative Fuel Trim by captainking(m): 8:30pm On Nov 12, 2018

Piyke:
Yes.

oh..i see.. Cos.. My Car just popped another code.. P0172 system too rich in addition to the previous code p0128...

Re: Negative Fuel Trim by Kokomo: 11:17am On Jul 12, 2021

clear code and rescan

Re: Negative Fuel Trim by Nobody: 12:27pm On Jan 04, 2022

autologic:
I guess your car is Honda ,this is an Indication that you are running your car temperature below the optimum specified temperature .
You must be running your fan direct or thermostat removed or both which can spell doom for your engine cos of lubrication issue .
Running rich is even the least of the issue now but wear and tear in your engine in the long run .

I think your coolant temp sensor is disconnected. Need to reconnect it cos the ECU reads it to know your engine temp.

Thermostat or no thermostat, if the CTS is offline you will have this problem, stupid design by honda.

Re: Negative Fuel Trim by Kokomo: 6:21pm On Jan 18, 2022

quentin06:
I think your coolant temp sensor is disconnected. Need to reconnect it cos the ECU reads it to know your engine temp.

Thermostat or no thermostat, if the CTS is offline you will have this problem, stupid design by honda.

Yeah, I wonder why they have two coolant temperature sensors, corolla for example has just 1

Re: Negative Fuel Trim by AutoManual: 11:02am On Apr 10, 2023

captainking:
oh..i see.. Cos.. My Car just popped another code.. P0172 system too rich in addition to the previous code p0128...

bro did you fix that problem? I am having this p0128. My thermostat is intact. It comes up when the engine is hot.

1 2 Reply

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