DTC P1868. Cadillac Seville

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2001 🢒 Seville - RHD 🢒 Engine 🢒 Engine Controls - 4.6L 🢒 DTC P1868

Circuit Description

Transmission fluid life is determined by monitoring transmission fluid temperature over a period of time. The PCM calculates transmission fluid life based on a set of temperature ranges stored in PCM memory. As the vehicle is driven, a counter increments. The rate at which the counter increments depends on the temperature range in which the transmission is currently operating in. The higher the temperature range, the faster the counter increments. As the counts increment, the PCM will begin to decrease the fluid life percentage from 100 (high fluid life) to 0 (low fluid life).

If the PCM detects a calculated transmission oil life of 10% or less, then DTC P1868 sets. DTC P1868 is a type C DTC.

Conditions for Running the DTC

No TFT DTCs P0711, P0712, or P0713.

Conditions for Setting the DTC

The calculated transmission oil life remaining is 10% or less.

Action Taken When the DTC Sets

•	The PCM does not illuminate the malfunction indicator lamp (MIL).

•	CHANGE TRANSMISSION FLUID displays on the driver information center (DIC).

•	The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Failure Records.

•	The PCM stores DTC P1868 in PCM history.

Conditions for Clearing the DIC/DTC

•	The PCM clears the DIC when the condition no longer exits.

•	A scan tool can clear the DTC.

•	The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission-related diagnostic fault occurring.

•	The PCM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Step	Action	Value(s)	Yes	No
1	Did you perform the Powertrain Diagnostic System Check?	--	Go to Step 2	Go to Diagnostic System Check - Engine Controls in Engine Controls
2	Install a Scan Tool . Turn ON the ignition, with the engine OFF. Important: Before clearing the DTC, use the scan tool in order to record the Failure Records. Using the Clear Info function erases the Failure Records from the PCM. Record the DTC Failure Records. Clear the DTC. Change the AT fluid and filter. Refer to Transmission Fluid Filter Replacement . Inspect the AT fluid for correct level. Add new fluid as necessary. Use the scan tool in order to reset the transmission oil life monitor to 100%. Did you complete the above procedures?	--	Go to Step 3	--
3	Perform the following procedure in order to verify the repair: Select DTC. Select Clear Info. Ensure that the transmission oil life monitor displays 100%. Select Specific DTC. Enter DTC P1868. Has the test run and passed?	--	System OK	Go to Step 1

Value(s)

Yes

Did you perform the Powertrain Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Engine Controls in Engine Controls

Install a Scan Tool .
Turn ON the ignition, with the engine OFF.

Important: Before clearing the DTC, use the scan tool in order to record the Failure Records. Using the Clear Info function erases the Failure Records from the PCM.