Description of the P0514 fault code.
OBD2 Error Codes

P0514 Battery temperature sensor signal level is outside acceptable values

26.05.2022 /

P0514 – OBD-II Trouble Code Technical Description

The P0514 code indicates that there is a problem with the battery temperature sensor signal level.

What does the fault code mean P0514?

Trouble code P0514 indicates a problem with the battery temperature sensor (BTS) or the voltage signal from it. The BTS is usually located near the battery or integrated into the engine control module (PCM). This sensor measures battery temperature and reports it to the PCM. When the PCM detects that the signal from the BTS sensor is not as expected, the code P0514 is set.

Fault code P0514.

Possible reasons

Some possible reasons for the P0514 trouble code:

  • Faulty Battery Temperature Sensor (BTS): Problems with the sensor itself, such as corrosion, breaks or short circuits in its circuit, can result in erroneous data or no signal.
  • Damaged or faulty wiring: Opens, shorts or other damage in the wiring between the BTS sensor and the PCM may cause the signal to not be transmitted correctly.
  • PCM Problems: A malfunction in the engine control module (PCM) itself can cause an error in processing the signal from the BTS sensor.
  • Battery Problems: Damage or malfunction of the battery can also cause erroneous temperature readings to be reported through the BTS.
  • Electrical System Problem: Problems with other electrical system components, such as shorts, opens, or corrosion in connectors, can cause erroneous data transmission between the BTS and the PCM.

What are the symptoms of a fault code? P0514?

With DTC P0514, the following symptoms may occur:

  • Check Engine Light Appears: This is the most common symptom that can appear on your dashboard.
  • Problems with starting the engine: It may be difficult to start the engine or completely fail to start.
  • Unusual engine behavior: The engine may experience rough running, jerking, or loss of power due to the PCM not operating properly.
  • Loss of performance and fuel economy: If the PCM does not properly regulate engine operation based on incorrect data from the battery temperature sensor, it may result in loss of performance and poor fuel economy.
  • Automotive electrical faults: It is possible that other components of the electrical system, such as the ignition system or battery charging system, may also be affected, which may manifest as unusual electrical symptoms such as intermittent power problems.

How to diagnose a fault code P0514?

To diagnose DTC P0514, follow these steps:

  1. Checking the Check Engine indicator: Use an OBD-II scanner to check for trouble codes and make sure the P0514 code is indeed present.
  2. Checking the battery status: Check the battery condition and voltage. Make sure the battery is charged and working properly.
  3. Checking the battery temperature sensor: Check the battery temperature sensor (BTS) for damage or corrosion. Make sure the wires are connected correctly and there are no breaks.
  4. Checking connections: Check the connections between the battery temperature sensor and the PCM for oxidation, disconnections or other damage.
  5. PCM diagnostics: If everything else is fine, the problem may be in the PCM. Run additional diagnostics on the PCM to ensure it is operating properly.
  6. Checking Other DTCs: Sometimes the P0514 code can be associated with other trouble codes. Check for other trouble codes that may be present in the system and correct them if necessary.
  7. Consultation with a mechanic: If you cannot determine the cause of the problem yourself, contact a qualified mechanic or auto repair shop for further diagnosis and repair.

Diagnostic errors

When diagnosing DTC P0514, the following errors may occur:

  • Insufficient battery check: You must ensure that the battery is working correctly and has sufficient charge for normal operation of the system.
  • Incorrect battery temperature sensor check: Incorrect diagnosis of the Battery Temperature Sensor (BTS) may result in incorrect conclusions. It is important to ensure that the sensor is working correctly before drawing further conclusions.
  • Ignoring other fault codes: Sometimes the problem causing the P0514 code can be related to other trouble codes. Any other fault codes that may be present in the system must be checked and resolved.
  • Incorrect PCM diagnosis: If all other components have been checked and no problems are found, additional PCM diagnostics may be required. You must ensure that the PCM is operating correctly and is able to correctly interpret data from the battery temperature sensor.
  • Lack of checking connections and wiring: You should carefully check the condition of the wiring and connections between the battery temperature sensor and the PCM. An incorrect connection or a broken wire can lead to erroneous data and, as a result, an erroneous diagnosis.

How serious is the fault code? P0514?

Trouble code P0514 is not critical, but it does indicate potential problems with the battery temperature monitoring system. Although there is no immediate threat to the safety or performance of the vehicle, improper operation of this system can cause problems with battery charging and battery life. Therefore, it is recommended to take measures to resolve this fault as soon as possible to avoid possible problems with the vehicle's power supply.

What repair will help eliminate the code? P0514?

To resolve DTC P0514, perform the following repair steps:

  1. Check the battery temperature sensor (BTS) for damage or corrosion.
  2. Check the electrical connections between the BTS sensor and the engine control module (PCM) for opens or shorts.
  3. Check the integrity of the wiring, including the wires and connectors associated with the battery temperature sensor.
  4. Check the BTS sensor parameters using a diagnostic scan tool to ensure it is sending correct data to the PCM.
  5. If necessary, replace the battery temperature sensor or correct wiring and connection problems.

If after following these steps the problem does not resolve, it is recommended that you contact a qualified automotive technician for further diagnosis and repair.

P0514 Battery Temperature Sensor Circuit Range/Performance 🟢 Trouble Code Symptoms Causes Solutions

P0514 – Brand-specific information

List of some car brands with explanations for trouble code P0514:

Each manufacturer may have slight variations in the decoding of fault codes, so for a more accurate diagnosis it is recommended to contact a service specialist for vehicles of this brand.

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