Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
2Original wording in English
CHRYSLER, DODGE, HARLEY-DAVIDSON, JEEP
CHRYSLER/DODGE/JEEP: FLASH:DIAGNOSTIC TROUBLE CODE, DTC P0740 OR P1798 AND AUTOMATIC TRANSMISSION SHIFT IMPROVEMENTS 1-2 OR 2-3 COLD SHIFT IMPROVEMENTS. *PE
JAGUAR
ADDITIONAL INFORMATION ON DIAGNOSTIC TROUBLE CODES P1635 P1798 ON VEHICLES WITHIN VIN 018108-ON THROUGH 812256-ON. *YC
Check vehicle applicability
28A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Coolant Temperature Circuit Malfunction
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.