AutoCodes – Mercury – P0512 Mercury

P0512 Mercury Code - Starter Request Circuit

Quick Answer

This Diagnostic Trouble Code (DTC) indicates that the Push Button Ignition Switch Powertrain Control Module (PCM) input circuit has power while the ignition is in the OFF position. Common causes include Faulty Push Button Ignition Switch, Push Button Ignition Switch harness is open or shorted, Push Button Ignition Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0512 Mercury indicates Starter Request Circuit.
Common causes: Common causes include Faulty Push Button Ignition Switch, Push Button Ignition Switch harness is open or shorted, Push Button Ignition Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 569

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0512 Mercury Description

This Diagnostic Trouble Code (DTC) indicates that the Push Button Ignition Switch Powertrain Control Module (PCM) input circuit has power while the ignition is in the OFF position.

OBDII Code P0512 Mercury - Starter Request Circuit - AutoCodes.com — P0512 Mercury Code - Starter Request Circuit

What does this mean?

What are the Possible Causes of the DTC P0512 Mercury?

Faulty Push Button Ignition Switch
Push Button Ignition Switch harness is open or shorted
Push Button Ignition Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0512 Mercury?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0512 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the P0512 Mercury code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0512 Mercury Code

1. What are the common symptoms of OBDII code P0512 (Starter Request Circuit) in a Mercury vehicle?

- Common symptoms include difficulty starting the engine, intermittent starting issues, and the inability to start the vehicle at all.

2. What are the possible causes of OBDII code P0512 in a Mercury vehicle?

- The code P0512 can be triggered by a faulty starter relay, a malfunctioning ignition switch, wiring issues in the starter circuit, or a defective PCM (Powertrain Control Module).

3. How can I diagnose the OBDII code P0512 in my Mercury vehicle?

- You can diagnose the code P0512 by inspecting the starter relay, checking the ignition switch for proper operation, testing the wiring in the starter circuit for continuity, and scanning the PCM for any related faults.

4. Can a DIY enthusiast repair OBDII code P0512 in a Mercury vehicle?

- Yes, depending on the cause of the code, a DIY enthusiast with automotive repair experience can replace a faulty starter relay, ignition switch, or repair wiring issues in the starter circuit.

5. What are some tips for repairing OBDII code P0512 in a Mercury vehicle?

- Ensure the battery is disconnected before working on any electrical components, use a multimeter to test components for proper functionality, and consult the vehicle's service manual for accurate wiring diagrams.

6. Is it safe to continue driving my Mercury vehicle with OBDII code P0512?

- It is not recommended to drive your vehicle with code P0512 as it can lead to potential starting issues and may leave you stranded if the vehicle fails to start.

7. How much does it typically cost to repair OBDII code P0512 in a Mercury vehicle?

- The cost of repairing OBDII code P0512 can vary depending on the cause of the issue and whether you choose to perform the repairs yourself or take your vehicle to a mechanic. Costs can range from a few dollars for a relay to a few hundred dollars for more complex repairs.

8. Can a bad battery cause OBDII code P0512 to trigger in a Mercury vehicle?

- While a bad battery can contribute to starting issues, it is not a direct cause of OBDII code P0512. It is important to check the battery's condition and charge level as part of diagnosing starting problems.

9. Will resetting the OBDII code P0512 in my Mercury vehicle make the issue go away?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing code P0512. It is essential to diagnose and repair the issue to prevent it from recurring.

10. How long does it typically take to repair OBDII code P0512 in a Mercury vehicle?

- The time to repair OBDII code P0512 can vary depending on the cause of the issue, your experience level, and the availability of parts. Simple repairs like replacing a relay can be done in under an hour, while more complex issues may take several hours or more to diagnose and fix.