P0512 OBD-II Trouble Code: Starter Request Circuit

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0512 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0512 code

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 $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0512 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

Diagnostic Trouble Code (DTC): P0512

P0512 code definition

The P0512 trouble code means that there has been a malfunction with the starter request.

What the P0512 code means

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.

What causes the P0512 code?

There are a few things that could cause this code:

  • There is a poor electrical connection hampering the immobilizer ability to detect the correct signal
  • The immobilizer antenna is damaged or broken
  • An open or short circuit is preventing the immobilizer from recognizing the correct signal
  • Something is wrong with the transponder inside the owner’s fob
  • There is insufficient voltage because of a weak battery (starting the engine demands the most amount of energy)

What are the symptoms of the P0512 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.

How does a mechanic diagnose the P0512 code?

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.

Common mistakes when diagnosing the P0512 code

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.

How serious is the P0512 code?

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.

What repairs can fix the P0512 code?

The most common approaches to fixing the P0512 code are:

  • Repairing or replacing disconnected, damaged, corroded or shorted connectors, wiring and components
  • Replacing or repairing the immobilizer antenna
  • Repairing or replacing the fob
  • Addressing a lack of sufficient voltage

Additional comments for consideration regarding the P0512 code

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.

Need help with a P0512 code?

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.

trouble codes
Check Engine Light
key fob
Immobilizer System

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0512 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,636

Rating Summary
3,315
161
42
24
94
3,315
161
42
24
94

Paul

22 years of experience
206 reviews
Paul
22 years of experience
Very friendly, knew what he was talking about, took care of the problem and made me a believer. My wife and I will definitely recommend you guys and Paul to a lot family and friends in our circle. We have been looking for someone to trust for a long time.
1994 FORD RANGER - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA

Richard

18 years of experience
451 reviews
Richard
18 years of experience
Richard was very informative, thorough, and professional. He provides excellent customer service.
1998 MAZDA MILLENIA - CHECK ENGINE LIGHT IS ON - ATLANTA, GEORGIA

Jay

34 years of experience
566 reviews
Jay
34 years of experience
Man I was nervous to hear what's wrong but it's always good to actually know what is wrong with your vehicle. So now it's get fixed tomorrow thanks Jay for your expertise in cars have a blessed day.
2013 NISSAN SENTRA - CHECK ENGINE LIGHT IS ON - HIGHLAND, CALIFORNIA

Ricardo

8 years of experience
223 reviews
Ricardo
8 years of experience
Good work! Quickly identified the issue (Fuel tank cap) and corrected it. Fair and honest, communicated well.
2013 DODGE GRAND CARAVAN - CHECK ENGINE LIGHT IS ON - LOS ANGELES, CALIFORNIA

More related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...

Related questions

Q: Coolant temperature sensor issue

If the vehicle is not overheating and the check engine light is NOT "flashing", and there are no other outward indications of the engine malfunctioning, it is safe to drive the car until it is convenient for you to request...

Q: My oil pressure low light comes oil and I replaced the sensor several times but it still comes on

Hello, thank you for writing in. Particularly having the check engine light on, the vehicle will have set off diagnostic troubleshooting codes that pertain to whatever component has set off the warning lights. You will want to start by having...

Q: Keyless entry is not staying programmed.

Hi there. Check the battery in the keyless entry key fob. Sounds like the battery is no longer holding a charge and needs replaced. When unplugging the battery cable to the vehicle, it resets the keyless entry programming to a...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com