P1198 – Jeep DTC

Jeep DTC P1198 – Radiator Temperature Sensor Volts Too High

DTC P1198 meaning on Jeep

1. DTC P1198 indicates that the Radiator Temperature Sensor is reporting a voltage reading that is higher than expected by the Engine Control Module (ECM).

Jeep DTC P1198 symptoms

• Check Engine Light (CEL) illuminated on the dashboard.
• Engine may run hotter than normal.
• Possible decrease in engine performance.

Jeep DTC P1198 causes

• Failed Radiator Temperature Sensor.
• Wiring or connector issues in the sensor circuit.
• ECM malfunction.

Jeep DTC P1198 seriousness

1. If left unresolved, DTC P1198 can lead to engine overheating and potential damage.

How to diagnose DTC P1198 on Jeep

1. Use a diagnostic scanner to retrieve the fault code and related data.
2. Inspect the Radiator Temperature Sensor and its wiring for any visible damage or corrosion.
3. Test the sensor’s resistance and voltage output to determine if it is functioning correctly.

How to fix DTC P1198 on Jeep

1. Replace the Radiator Temperature Sensor if it is found to be faulty.
2. Repair any damaged wiring or connectors in the sensor circuit.
3. If the issue persists, have the ECM checked and reprogrammed if necessary.

How to erase DTC P1198 on Jeep

1. Use a diagnostic scanner to clear the fault code from the ECM’s memory.
2. Ensure that the underlying issue causing DTC P1198 has been resolved before clearing the code.