07/26/20 12:18 PM
DTC 0021

92 Galant VR4 168/1000
Link v3 SD

Coolant temp reads -74 constantly.

Have a CEL
0021 code

I installed a New sensor, cleared codes and CEL
comes back on after a couple minutes.

Yellow/Green wire & Green/Black wires both have continuity from sensor plug to ECU plug.

Anybody have ideals?????

(I ain't no puny human)
07/27/20 06:26 AM
Re: DTC 0021

That issue is all over this site (and DSM sites). Look at your wiring to the Coolant Temp Sensor on the thermostat housing. Either a disconnected connector or broken wire.

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