No
Text Box: No

Yes
Text Box: Yes
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Does Scan tool report -22 F or less?
Text Box: Does Scan tool report -22 F or less? Code 15

Coolant Sensor Temperature (Low Temperature indication)

Yellow wire is open, bad connection at ECM, or bad ECM
Text Box: Yellow wire is open, bad connection at ECM, or bad ECM

Bad ground on the black wire, bad connection or bad ECM
Text Box: Bad ground on the black wire, bad connection or bad ECM

No
Text Box: No

Yes
Text Box: Yes
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Jumper yellow wire to ground
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Does Scan tool show 266 F or more?
Text Box: Jumper yellow wire to ground Does Scan tool show 266 F or more?

Bad Sensor or connection
Text Box: Bad Sensor or connection

No
Text Box: No

Yes
Text Box: Yes

Code 15 is intermittent.  If no other codes are stored, check the tips below
Text Box: Code 15 is intermittent.  If no other codes are stored, check the tips below
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Disconnect Sensor
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Jumper terminals together
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Does Scan tool show 266 F or more?
Text Box: Disconnect Sensor Jumper terminals together Does Scan tool show 266 F or more?

 

 

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