P0628 Jeep Code - Low Voltage Detected At The Fuel Lift Pump
Quick Answer
The Powertrain Control Module (PCM) monitors the Fuel Lift Pump. Common causes include Faulty Fuel Lift Pump, Fuel Lift Pump harness is open or shorted, Fuel Lift Pump 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
- P0628 Jeep indicates Low Voltage Detected At The Fuel Lift Pump.
- Common causes
- Common causes include Faulty Fuel Lift Pump, Fuel Lift Pump harness is open or shorted, Fuel Lift Pump 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 P0628 Jeep Description
What are the Possible Causes of the DTC P0628 Jeep?
- Faulty Fuel Lift Pump
- Fuel Lift Pump harness is open or shorted
- Fuel Lift Pump circuit poor electrical connection
How to Fix the DTC P0628 Jeep?
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 P0628 Jeep 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 P0628 Jeep Code
What does the OBDII code P0628 mean in a Jeep?
The P0628 code indicates low voltage has been detected at the fuel lift pump, which may affect fuel delivery to the engine.
What are the common symptoms of the P0628 code in a Jeep?
Symptoms may include engine stalling, difficulty starting, reduced power, or an illuminated check engine light.
What causes the P0628 code to appear in a Jeep?
Common causes include a faulty fuel lift pump, damaged wiring or connectors, a failing fuel pump relay, or a weak battery.
Can a bad fuel pump cause the P0628 code in a Jeep?
Yes, a malfunctioning or failing fuel lift pump is one of the primary causes of this code.
How can I diagnose the P0628 code in my Jeep?
Check the battery voltage, inspect the wiring and connectors to the fuel pump, test the fuel pump relay, and measure the voltage at the fuel lift pump.
Is it safe to drive my Jeep with the P0628 code?
Driving with this code is not recommended as it could lead to engine stalling or cause further damage to the fuel system.
How do I fix the P0628 code in a Jeep?
Repairs may involve replacing the fuel lift pump, repairing damaged wiring or connectors, replacing the fuel pump relay, or ensuring the battery is fully charged.
Can a weak battery trigger the P0628 code in a Jeep?
Yes, a weak or failing battery can cause low voltage at the fuel lift pump, triggering the P0628 code.
What tools do I need to troubleshoot the P0628 code?
You’ll need an OBDII scanner, a multimeter, and possibly a fuel pressure gauge to diagnose the issue accurately.
Will clearing the P0628 code fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for P0628 Jeep OBDII Code
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