Description:

This diagnostic trouble code is generated when the filter bypass valve (for cold-weather starting) is open while the transmission input speed (engine speed) is above 1400 rpm and transmission oil temperature exceeds +30°C (86°F). If diagnostic trouble code PTA 000127.01 is also stored, process that code first.

Reaction:

Warning remains active until the fault is corrected, indicating a non-critical issue with the filter bypass valve.

Recommendations:

Inspect Filter Bypass Valve:

• Verify that the filter bypass valve is functioning correctly.
• Replace the valve if it is faulty.

Check Pressure Switch:

• Ensure that the pressure switch is operating correctly.
• Repair or replace the pressure switch if necessary.

Examine Wiring and Connectors:

• Inspect all wiring and connectors associated with the filter bypass valve and pressure switch for signs of damage or disconnection.
• Repair or replace any damaged components to ensure proper electrical connections.

Verify Operating Conditions:

• Ensure that the vehicle is not operating under conditions that could inadvertently trigger this fault (e.g., excessively high transmission oil temperatures).

Process Related Codes:

• If diagnostic trouble code PTA 000127.01 is also stored, address that issue first as it may be related.

Consult Technical Support:

• If the issue persists, consult technical support or the manufacturer for further diagnosis and assistance.

Note:

Proper functionality of the filter bypass valve is important for vehicle operation, especially in varying temperature conditions. Regular inspection and maintenance can help prevent these issues.