P2514 indicates the Powertrain Control Module (PCM) has detected a high voltage condition on the Event Data Recorder (EDR) request circuit. The EDR, essentially a vehicle 'black box' that records crash data, communicates with the PCM through this circuit. When the PCM sees an abnormally high voltage signal where a low/ground signal is expected, it sets this code.
Short to power, damaged insulation, or corroded connectors in the EDR request circuit - by far the most common cause.
The Event Data Recorder is typically integrated into the airbag control module; internal failure can cause high voltage on the communication circuit.
Damaged, corroded, or loose connectors at the PCM or EDR/airbag module can cause intermittent high voltage conditions.
Aftermarket alarms, stereos, or other accessories spliced into the EDR circuit can cause voltage anomalies.
Poor ground connection at the EDR or related module can result in the circuit reading high when it should read low.
Rare - the PCM itself is almost never the cause of P2514. Consider this only after all other causes are ruled out.
Almost never. The PCM is the least likely cause of P2514. The code indicates a problem with the Event Data Recorder circuit itself - the PCM is simply detecting the fault. Replacing the PCM without fixing the underlying issue will not resolve the code.
In most cases, the vehicle can be driven normally, but the underlying issue should be diagnosed. If the code is accompanied by airbag system faults, there may be reduced crash protection.
Not necessarily. Many P2514 cases are resolved by repairing wiring or connectors. The airbag control module (which contains the EDR) should only be replaced after wiring and circuit issues are confirmed to be the cause.
An EDR is a device installed in vehicles to record technical data before, during, and after a crash. It's similar to an airplane's black box and stores information like vehicle speed, brake status, and airbag deployment timing for accident analysis.