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P0512 is a diagnostic trouble code (DTC) for "Starter Request Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $79.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0512 trouble code means that there has been a malfunction with the starter request.
Starting a car is easy enough: put the key into the ignition and turn. However, the actual process behind this task is far more complicated. Mechanical keys are paired with resistors and radio transponders with unique codes. This last part is true with today’s push-button ignition systems. P0512 codes are only ever triggered in this type of vehicle.
The engine immobilizer system in a vehicle must be programmed to detect the transponder. Essentially, the transponder gives off a signal that the immobilizer can recognize with the help of a tiny antenna. Once it does this, the driver only needs to step on the brake pedal and press the start button to bring their vehicle to life.
If it isn’t able to detect this signal, yet an attempt is made to start the automobile, the immobilizer may lock out the starter and trigger the P0512 code.
There are a few things that could cause this code:
The most obvious symptom of the P0512 code is that the vehicle won’t start. However, there are times when the vehicle will actually cooperate but the code is still stored. Sometimes the automobile will start, but after a short delay. The driver may hear extended cranking before the vehicle finally complies. The Check Engine Light will mostly come on too.
To begin the process of diagnosing this problem, the mechanic will start by using an OBD-II scanner to confirm the P0512 code has been stored and see if any others have been as well, (i.e. P0513 and P0633, both of which deal with the immobilizer).
After that, the mechanic will move on to inspect the fob for a bad antenna ring or damage that may be keeping it from working. If those components seem fine, they’ll examine all the wiring and electrical connectors connected to the immobilizer to ensure they are all working correctly.
When the vehicle simply isn’t responding to the owner’s fob, most mechanics will correctly look at this issue early on. Unfortunately, if there is an audible cranking, many may assume that the problem has to do with the fuel and ignition system. Therefore, they will begin looking at the ignition coils, fuel injectors and fuel pumps for signs of a problem.
P0512 isn’t a trouble code that represents danger, but it will need to be repaired before an owner can begin using their vehicle again. Even if there is just a delay before the automobile starts, this will most likely change in the near future.
The most common approaches to fixing the P0512 code are:
Even if the owner is able to get their vehicle to start, if it’s clearly struggling and/or making an audible cranking noise, it’s a good idea to have the vehicle repaired right away. Though it may technically still be working, those sounds represent far bigger concerns on the horizon.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.