P0512
UniversalThe Starter Request Circuit indicates that the Powertrain Control Module (PCM) has detected an abnormal condition in the circuit that activates the starter motor.
High SeverityThis code means your vehicle's computer has detected an issue within the starter request circuit, which is responsible for telling the starter motor to engage. As a result, your engine may not crank or start when you turn the ignition key or press the start button.
⚠️ Before You Begin (Safety First)
Always disconnect the negative battery terminal before working on electrical components to prevent accidental shorts or shocks. Ensure the vehicle is in Park or Neutral with the parking brake engaged when testing.
Common Symptoms
- Engine does not crank when attempting to start
- Engine cranks but does not start
- Intermittent no-start condition
- Check Engine Light illuminated
Common Causes
- Blown starter fuse
- Faulty starter relay
- Corroded or loose battery terminals
- Faulty ignition switch
- Faulty Park/Neutral safety switch
- Open or short in starter request circuit wiring
- Faulty starter motor (less common for this specific circuit code, but a possibility)
Frequently reported on: General/Universal
Diagnostic Steps
- Check all relevant fuses in the under-hood and cabin fuse boxes, specifically those for the starter or ignition system.
- Locate and test the starter relay; try swapping it with a known good, identical relay (e.g., from the horn).
- Inspect battery terminals for corrosion and ensure they are tight. Clean if necessary.
- Test battery voltage; a low battery can prevent the starter from engaging.
- If accessible, visually inspect wiring leading to the starter and ignition switch for damage, chafing, or loose connections.
👨🔧 When to Call a Professional
If you have checked basic components like fuses and relays and the vehicle still doesn't start, or if you lack experience with electrical diagnostics, it's best to consult a professional mechanic. Complex wiring issues or module failures require specialized tools and expertise.
Commonly Asked Questions
What does P0512 mean for my car?
P0512 indicates a problem in the electrical circuit that tells your starter motor to engage. This typically means your car might not crank or start when you try to turn it on.
Can I drive my car with a P0512 code?
No, if your car has a P0512 code, it usually means the starter isn't engaging, so the engine will not start. The vehicle will be inoperable.
What are the first things I should check if I get a P0512 code?
Begin by checking your battery terminals for corrosion and ensuring they are tight. Next, inspect the fuses and relays related to the starter and ignition system, as these are common points of failure.
Is a P0512 code always a starter motor problem?
Not necessarily. While the starter motor is the ultimate recipient of the 'request,' the code specifically points to the 'starter request circuit.' The issue is often with components like fuses, relays, the ignition switch, or the neutral safety switch, or the wiring itself, rather than the starter motor.
How much does it cost to fix a P0512 code?
The cost varies significantly depending on the underlying cause. A blown fuse might cost only a few dollars, while replacing an ignition switch or repairing complex wiring could range from $100 to $500 or more, including parts and labor.