P1587 Mercedes-Benz Code - Engine Control Module Supply Voltage
Quick Answer
P1587 Mercedes-Benz indicates Engine Control Module Supply Voltage. Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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
- P1587 Mercedes-Benz indicates Engine Control Module Supply Voltage.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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.
Code P1587 Mercedes-Benz Description
What are the Possible Causes of the DTC P1587 Mercedes-Benz?
- Faulty Engine Control Module (ECM)
- ECM harness is open or shorted
- ECM circuit poor electrical connection
How to Fix the DTC P1587 Mercedes-Benz?
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 P1587 Mercedes-Benz 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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Frequently Asked Questions about P1587 Mercedes-Benz Code
1. What does the OBDII code P1587 mean on a Mercedes-Benz?
P1587 indicates an issue with the Engine Control Module (ECM) supply voltage, which means the ECM is not receiving the correct voltage to operate properly.
2. What are the common symptoms of the P1587 code on a Mercedes-Benz?
Common symptoms include engine stalling, rough idling, trouble starting the vehicle, reduced performance, or the Check Engine Light being illuminated.
3. What causes the P1587 code to appear in a Mercedes-Benz?
The most common causes are a weak or failing battery, a faulty alternator, damaged wiring or connectors, or a malfunctioning Engine Control Module.
4. Can a bad battery trigger the P1587 code?
Yes, a weak or failing battery can cause insufficient voltage to the ECM, triggering the P1587 code.
5. How is the P1587 code diagnosed?
Diagnosis involves checking the battery and alternator voltage, inspecting wiring and connectors for damage, and testing the ECM for faults using a diagnostic scanner.
6. Can I drive my Mercedes-Benz with a P1587 code?
Driving with this code is not recommended, as it can lead to engine stalling or other performance issues that may compromise safety.
7. How do I fix the P1587 code on a Mercedes-Benz?
Repairs typically involve replacing a weak battery, repairing or replacing damaged wiring, testing and repairing the alternator, or, in rare cases, replacing the ECM.
8. How much does it cost to fix the P1587 code on a Mercedes-Benz?
The cost can vary depending on the root cause, ranging from $100–$300 for battery or wiring repairs to $1,000+ if the ECM needs replacement.
9. Can a faulty alternator cause the P1587 code?
Yes, a faulty alternator can fail to provide sufficient voltage to the ECM, causing the P1587 code to appear.
10. Does clearing the P1587 code solve the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return. Proper diagnosis and repair are necessary.
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