P0629 Chevrolet Code - Fuel Pump Speed Output Circuit High Voltage
Quick Answer
The P0629 code for Chevrolet vehicles indicates that there is a high voltage condition detected in the fuel pump speed output circuit. Common causes include Faulty fuel pump speed sensor, Wiring issues in the fuel pump speed output circuit, Malfunctioning ECM. 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
- P0629 Chevrolet indicates Fuel Pump Speed Output Circuit High Voltage.
- Common causes
- Common causes include Faulty fuel pump speed sensor, Wiring issues in the fuel pump speed output circuit, Malfunctioning ECM.
- 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 P0629 Chevrolet Description
The P0629 code for Chevrolet vehicles indicates that there is a high voltage condition detected in the fuel pump speed output circuit. This means that the Engine Control Module (ECM) has detected that the voltage in the circuit that controls the fuel pump speed is higher than the specified range. The fuel pump speed output circuit is responsible for controlling the speed of the fuel pump, which in turn regulates the fuel pressure in the fuel system.
Common Causes of P0629 Chevrolet
- Faulty fuel pump speed sensor
- Wiring issues in the fuel pump speed output circuit
- Malfunctioning ECM
- Defective fuel pump
- Poor electrical connections
Symptoms of P0629 Chevrolet
- Engine misfires
- Poor acceleration
- Stalling or hesitation during acceleration
- Difficulty starting the vehicle
- Check Engine Light illuminated
How to Fix P0629 Chevrolet
- Diagnose the issue by using a scan tool to check for the P0629 code and perform a visual inspection of the fuel pump speed output circuit.
- Test the fuel pump speed sensor and replace it if faulty.
- Inspect the wiring in the fuel pump speed output circuit and repair any damaged wires or connections.
- Check the ECM for any signs of malfunction and replace it if necessary.
- Test the fuel pump for proper operation and replace it if it is determined to be defective.
Cost to Fix P0629 Chevrolet
The cost of repairing a P0629 code on a Chevrolet vehicle can vary depending on the specific cause of the issue. Generally, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $200. Therefore, the total cost of resolving this issue could be between $200 and $700. It's important to note that the actual cost may differ based on the location of the repair, the make and model of the vehicle, and the rates of the auto repair shop. It's recommended to consult with a professional mechanic for a more accurate cost estimate.
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Information for Specific Chevrolet Models
- P0629 2014 Chevrolet Silverado — Fuel Pump Speed Output Circuit High Voltage
- P0629 2015 Chevrolet Silverado — Fuel Pump Speed Output Circuit High Voltage
- P0629 2016 Chevrolet Silverado — Fuel Pump Speed Output Circuit High Voltage
- P0629 2017 Chevrolet Silverado — Fuel Pump Speed Output Circuit High Voltage
- P0629 2018 Chevrolet Silverado — Fuel Pump Speed Output Circuit High Voltage
Frequently Asked Questions about P0629 Chevrolet Code
What does the OBDII code P0629 mean on a Chevrolet?
1. P0629 indicates that the fuel pump speed output circuit is experiencing a high voltage issue, which could affect fuel delivery to the engine. 2.
What are the common symptoms of code P0629 on a Chevrolet?
Common symptoms include difficulty starting the engine, reduced engine performance, stalling, or the check engine light being illuminated. 3.
What causes the P0629 code to be triggered on a Chevrolet?
Possible causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump control module, or a short to voltage in the circuit. 4.
Can I drive my Chevrolet with a P0629 code?
Driving with a P0629 code is not recommended as it can lead to poor engine performance, stalling, or further damage to the fuel system. 5.
How is the P0629 code diagnosed on a Chevrolet?
A technician will typically use a scan tool to confirm the code, inspect wiring and connectors for damage, test the fuel pump relay, and check the fuel pump control module for proper operation. 6.
How do I fix the P0629 code on my Chevrolet?
Repairs may include replacing a faulty fuel pump relay, repairing damaged wiring or connectors, or replacing the fuel pump control module if it is defective. 7.
Can a bad fuel pump cause the P0629 code on a Chevrolet?
While a bad fuel pump is not the most common cause, it can indirectly trigger the P0629 code if it leads to circuit abnormalities. 8.
How much does it cost to fix the P0629 code on a Chevrolet?
Repair costs vary depending on the cause but typically range from $100 to $500, including parts and labor, with higher costs for fuel pump control module replacement. 9.
Will clearing the P0629 code fix the issue on my Chevrolet?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning. 10.
Can a software update resolve the P0629 code on a Chevrolet?
In rare cases, a software update to the Powertrain Control Module (PCM) may resolve the issue if it is related to a programming error, but this is less common.
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