Technical Description of OBD-II Trouble Code
The circuit for the Battery Temperature Sensor is experiencing a range/performance issue.
What does that mean?
This generic powertrain diagnostic trouble code can apply to all OBD-II equipped vehicles, but is more common in certain Chrysler, Dodge, Jeep, Mitsubishi, and Toyota vehicles.
Although it is a generic code, the specific repair steps may vary depending on the year, make, model, and powertrain configuration of the vehicle.
The Battery Temperature Sensor (BTS) is typically located near the battery or inside the PCM (powertrain control module). It converts the temperature of the air surrounding the battery into an electrical signal for the PCM.
The PCM uses this voltage signal to determine the amount of voltage the battery will receive while charging, based on localized temperatures. This code is triggered if the input does not match the normal engine operating conditions stored in the PCM’s memory, even for a brief moment. It also checks the voltage signal from the BTS sensor during initial Key On.
Code P0514 indicates a range or performance problem in the circuit, which could be caused by mechanical (physical damage to the sensor, resulting in an electrical fault) or electrical (BTS sensor circuit) issues. These possibilities should not be overlooked during troubleshooting, especially when dealing with an intermittent problem.
P0516 is set when the voltage at the sensor remains below a certain level (usually under 0.3V) for an extended period of time. This code is typically associated with an electrical circuit issue.
P0517 is set when the voltage at the sensor remains above a certain level (usually over 4.8V) for an extended period of time. This code is usually related to an electrical circuit issue.
The troubleshooting steps may vary depending on the manufacturer, type of BTS sensor, and wire colors. An example of a battery temperature sensor is shown here:
What is the severity of this DTC?
In these cases, the severity is not high. Since they are electrical failures, the PCM can compensate adequately for them.
What are some of the symptoms of the code?
Symptoms of a P0514 trouble code may include:
What are some of the common causes of the code?
Possible causes for this P0514 code may include:
What are some P0514 troubleshooting steps?
A good starting point is to check for technical service bulletins (TSB) for your vehicle. There may be a known issue with a known fix provided by the manufacturer, which can save time and money during diagnosis.
Next, locate the battery temperature sensor on your vehicle. It is usually located near the battery or inside the PCM. Once located, visually inspect the connector and wiring for any signs of damage such as scraping, rubbing, bare wires, burn spots, or melted plastic. Disconnect the connector and carefully inspect the terminals inside for any signs of burning or corrosion. If cleaning of the terminals is necessary, use electrical contact cleaner and a plastic bristle brush. After cleaning, let them dry and apply electrical grease to the contact points.
If you have a scan tool, clear the diagnostic trouble codes from memory and see if the P0514 code returns. If it does not, then the issue was most likely related to the connections.
If the P0514 code does return, further testing of the BTS sensor and its associated circuits is necessary. With the Key Off, disconnect the electrical connector at the BTS sensor. Connect a Digital Voltmeter’s black lead to the ground terminal at the BTS sensor wiring harness connector. Connect the red lead of the Digital Voltmeter to the signal terminal at the BTS sensor wiring harness connector. Turn the Key On but keep the Engine Off. Check the manufacturer’s specifications; the voltmeter should read 5 volts. If it does not, repair the signal or ground wire, or replace the PCM.
If the previous test passed and the P0514 code continues to appear, it is likely that the BTS sensor has failed. However, a failed PCM cannot be ruled out until the BTS sensor has been replaced. If unsure, seek assistance from a trained automotive diagnostician. PCMs must be programmed or calibrated to the vehicle for correct installation.
