[SOLVED] Dodge P1478 Code: Battery Temp Sensor Signal Fix Fast

The OBD code P1478 for Dodge indicates an issue with the Battery Temperature Sensor (BTS).

This code affects the battery temperature monitoring system.

Symptoms include the Engine Light being ON.

The cause could be a faulty BTS, open/shorted BTS harness, or poor electrical connection.

It’s a moderate issue.

To fix, inspect the wiring harness, connectors, and components for damage or corrosion.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	6.67 (Out of 10)

Symptoms of the Dodge p1478 OBD Code

The Dodge P1478 fault code typically triggers when there is an issue with the EVAP system.

Symptoms: Engine Light ON.
Possible rough idle.
Engine stalling at low speeds.
Loss of power during acceleration.
Hissing or sucking noise from the engine.

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Causes of the Dodge p1478 OBD Code

P1478 in Dodge indicates a fault in the EVAP system related to the EVAP canister vent control valve.

P1478 can be caused by a faulty Battery Temperature Sensor (BTS).
A Battery Temperature Sensor harness that is open or shorted.
A Battery Temperature Sensor circuit with a poor electrical connection.

Fixing Dodge Error Code p1478 Step By Step

To address Dodge fault code P1478, inspect the EVAP system for leaks or faulty components.

To fix the Dodge OBDII code P1478, first, review the possible causes mentioned above.
Visually examine the corresponding wiring harness and connectors for any damage.
Check the connector pins for signs of being broken, bent, pushed out, or corroded.
If no issues are found with the wiring, consider replacing the EVAP leak detection pump.
Clear the fault codes and perform a test drive to verify the repair.

Cost Of Fixing Dodge p1478 Fault Code

Diagnosing and repairing Dodge fault code P1478 may involve testing and replacing components.

The cost to diagnose and fix a Dodge OBD code P1478 typically ranges from $75 to $150 per hour for labor rates.

With an estimated repair time of 1. 0 hour, the total cost could be around $75 to $150, depending on shop rates and the complexity of the issue.

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Details of the Dodge p1478 OBD Code

Dodge fault code P1478 relates to the transmission temperature sensor voltage being too high.

Dodge OBD code P1478 means the ambient/battery temperature sensor voltage is too high.

This code is triggered by the Engine Control Module (ECM) when it detects a voltage signal from the ambient/battery temperature sensor that exceeds the specified range.

The ambient/battery temperature sensor is involved in monitoring the temperature of the surrounding air or the battery to help the ECM adjust fuel delivery and ignition timing for optimal performance.

Mechanic’s Tech Notes

For Dodge code P1478, check the EVAP system for leaks or a faulty purge control valve.

To diagnose and fix OBDII code P1478 on a Dodge, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) using a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of corrosion, bending, or breakage.

This thorough inspection can help identify and resolve the issue causing the P1478 fault code.

FAQ

1. What are the common symptoms associated with OBD code P1478 in a Dodge vehicle?

Common symptoms of OBD code P1478 in a Dodge vehicle include the Engine Light ON and possible causes are a faulty Battery Temperature Sensor or related wiring issues.

2. What is the typical cause of OBD code P1478 in a Dodge vehicle?

OBD code P1478 in a Dodge is typically caused by a faulty Battery Temperature Sensor (BTS), open/shorted harness, or poor electrical connection. Inspect and repair as needed.

3. How can I diagnose and repair OBD code P1478 in my Dodge vehicle?

Diagnose and repair OBD code P1478 in your Dodge by checking the Battery Temperature Sensor (BTS), its harness, and related connections for faults.

Wrap Up

If your Dodge is displaying OBD code P1478 and you’re experiencing issues with the EVAP system, it could be caused by a faulty EVAP leak detection pump, damaged wiring in the EVAP system, or a loose gas cap.

These issues can lead to difficulties in maintaining proper fuel tank pressure and may trigger the check engine light.

To address Dodge OBD code P1478, start by checking the condition of the EVAP system components, including the leak detection pump and associated wiring.

Ensure the gas cap is securely tightened and inspect the wiring harness for any signs of damage or corrosion that