P0627 Cadillac Code - Fuel Pump Speed Output Circuit
Quick Answer
The Engine Control Module (ECM) supplies voltage to the fuel pump driver control module for 30 s when the ignition is on and continuously when the engine is running. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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
- P0627 Cadillac indicates Fuel Pump Speed Output Circuit.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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 P0627 Cadillac Description
What are the Possible Causes of the DTC P0627 Cadillac?
- Faulty Fuel Pump Driver Control Module
- Fuel Pump Driver Control Module harness is open or shorted
- Fuel Pump Driver Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0627 Cadillac?
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 P0627 Cadillac 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 P0627 Cadillac Code
1. What does the OBDII code P0627 mean on a Cadillac?
P0627 indicates an issue with the fuel pump speed output circuit, which impacts the fuel pump's ability to operate properly.
2. What are the common symptoms of a P0627 code in a Cadillac?
Symptoms may include engine stalling, difficulty starting, poor acceleration, and a check engine light.
3. What causes the P0627 code on a Cadillac?
Common causes include a faulty fuel pump, damaged wiring or connectors in the fuel pump circuit, a malfunctioning fuel pump control module, or an ECM issue.
4. Can I drive my Cadillac with a P0627 code?
Driving with this code may result in poor vehicle performance or stalling. It’s best to address the issue promptly to avoid being stranded.
5. How do I diagnose the P0627 code on my Cadillac?
Start by inspecting the fuel pump wiring and connectors for damage. Use a multimeter to check voltage at the fuel pump and test the fuel pump control module.
6. How do I fix the P0627 code on a Cadillac?
Repairs may include replacing the fuel pump, repairing damaged wiring, replacing the fuel pump control module, or reprogramming the ECM if necessary.
7. How much does it cost to fix the P0627 code on a Cadillac?
Repair costs can range from $100 to $1,000 depending on whether it's a simple wiring repair or a fuel pump replacement.
8. Could a dirty fuel filter cause a P0627 code?
A dirty fuel filter is unlikely to cause this code, as it specifically relates to the fuel pump speed circuit rather than fuel flow issues.
9. Is the P0627 code related to other fuel system codes?
Yes, it may be accompanied by other codes like P0087 (low fuel rail pressure) if the fuel pump is not delivering adequate pressure.
10. Does the P0627 code always mean the fuel pump is bad?
No, the issue could stem from wiring, connectors, the control module, or even a software problem in the ECM. Proper diagnosis is essential.
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