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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Automatic Transaxle - 4T80-E - DTC P0218 To DTC P0977) >> DTC P0218 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The automatic transmission fluid temperature (TFT) sensor is a negative coefficient thermistor. When the transmission fluid is cold, the sensor resistance is high. As the transmission fluid warms up, the sensor resistance becomes lower. The transmission control module (TCM) uses TFT information to control torque converter clutch apply and release, line pressure, and shift time. The TFT range is from -40 to +151°C (-40 to +305°F).

If the TCM detects a high transmission fluid temperature for an extended period of time on the TFT sensor circuit, then DTC P0218 sets. DTC P0218 is a type C DTC.

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