That code is for cooling system malfunction.
We see that code around here about this time every year when its cold.
The engine temperature is monitored and if it takes too long to warm up this code is set.
99% or the time you need a new engine thermostat.
If its p1486 thats a cooling system malfunction code.
What year and model. so I can triple check it.
Yes thats it.
Dont let them screw you on this.here is the info on that code.
DTC P1486: Cooling System Malfunction
P0128-0071
General Description
The thermostat valve is closed when the engine coolant temperature is low, and it stops the circulation of engine coolant to
speed engine warm up. When the engine coolant temperature increases, the thermostat valve opens and circulates engine
coolant to control its temperature. On the other hand, when the engine coolant temperature decreases, the opening area of
the thermostat valve is reduced to regulate the engine coolant temperature. If the thermostat valve is stuck open, engine
warm up is delayed and exhaust emissions are adversely affected. The engine control module (ECM)/powertrain control
module (PCM) estimates the engine coolant temperature after starting the engine from the initial engine coolant temperature
and driving conditions, and compares it with the actual engine coolant temperature that is detected by the engine coolant
temperature (ECT) sensor.
If the actual engine coolant temperature is below the estimated engine coolant temperature (when x shown in the graph is
large), a malfunction in the thermostat valve is detected and a DTC is stored.
H&onda Technician
Dealership tech since 1982. ase and Honda Master tech