P0218

P0218-HIGH TEMPERATURE OPERATION ACTIVATED



Theory of Operation

The DTC is an informational code only and is being set to aid the technician in determining root cause of a customer driveability issue. The code is also intended to alert the technician to determine if a cooling system malfunction has occurred or if an additional transmission air to oil cooler should be added to the vehicle if the customer regularly drives in a manner that overheats the transmission.

- When Monitored:
Whenever the engine is running.

- Set Condition:
Immediately when an Overheat shift schedule is activated when the Transmission Oil Temperature reaches 115° C (240° F).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure

1. CHECK ENGINE COOLING SYSTEM
1. Perform Engine Cooling System diagnostics. Testing and Inspection

Is the Engine Cooling System functioning properly?

Yes

- Go To 2

No

- Repair the cause of the engine overheating. Refer to the Service Information for the related diagnostic or repair procedures.
- Perform 42RLE TRANSMISSION VERIFICATION TEST. 42RLE Transmission Verification Test

2. TRANSMISSION OIL COOLER RESTRICTED
1. Check the Transmission Oil Cooler Flow.

Is the transmission oil cooler restricted or plugged?

Yes

- Repair the cause of the plugged Transmission Oil Cooler as necessary and repair or replace the Transmission Oil Cooler.
- Perform 42RLE TRANSMISSION VERIFICATION TEST. 42RLE Transmission Verification Test

No

- Go To 3

3. HIGH TEMPERATURE OPERATION
1. This DTC is an informational DTC designed to aid the Technician in diagnosing shift quality complaints.
2. This DTC indicates that the transmission has been operating in the "Overheat" shift schedule which may generate a customer complaint.
3. The customer driving patterns may indicate the need for an additional transmission oil cooler.
4. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set.
5. Check for any Service Information Tune-ups or Service Bulletins for any possible causes that may apply.

Repair

- Repair the cause of transmission overheating.
- Perform 42RLE TRANSMISSION VERIFICATION TEST. 42RLE Transmission Verification Test