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Subaru
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1998
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Forester L F4-2.5L DOHC
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Manufacturer Code Charts
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DTC 21
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Transmission Control Systems
Transmission Control Systems
H: TROUBLE CODE 21 - ATF TEMPERATURE SENSOR
Diagnosis
Input signal circuit of TCM to ATF temperature sensor is open or shorted.
Trouble Symptom:
Excessive shift shock.
Wiring Diagram