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DTC 0021

SoJerz168

New member
Joined
May 11, 2009
Messages
2
Location
08054
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?????
 
Last edited:

thomcasey

Well-known member
Joined
Sep 24, 2014
Messages
907
Location
Indianapolis, IN
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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