P1199 – Jeep DTC

Jeep DTC P1199 – Radiator Temperature Sensor Volts Too Low

DTC P1199 meaning on Jeep

1. DTC P1199 indicates that the Radiator Temperature Sensor voltage is too low on a Jeep.

Jeep DTC P1199 symptoms

• Check Engine Light (CEL) may illuminate on the dashboard.
• Engine may run hotter than normal.
• Poor engine performance or fuel efficiency.

Jeep DTC P1199 causes

• Defective Radiator Temperature Sensor.
• Wiring issues or poor electrical connections related to the sensor.
• Faulty Engine Control Module (ECM).

Jeep DTC P1199 seriousness

1. If left unresolved, it can lead to engine overheating and potential damage.
2. Continued operation with this issue can result in poor engine performance and reduced fuel efficiency.

How to diagnose DTC P1199 on Jeep

1. Use an OBD-II scanner to retrieve the specific fault code (P1199).
2. Inspect the Radiator Temperature Sensor and its wiring for any visible damage or corrosion.
3. Check the sensor’s resistance and voltage values using a multimeter to verify its functionality.

How to fix DTC P1199 on Jeep

1. Replace the Radiator Temperature Sensor if it is found to be faulty.
2. Repair any damaged wiring or connectors associated with the sensor.
3. If necessary, replace the Engine Control Module (ECM) if it is determined to be the cause of the issue.

How to erase DTC P1199 on Jeep

1. After fixing the underlying issue, use an OBD-II scanner to clear the fault code (P1199).
2. Ensure that the repair has resolved the problem before clearing the code.