P2633 OBD II Trouble Code Fuel Pump B Control Circuit Low

• The check engine light is illuminated
• Engine won?t start
• Engine misfire/stall
• Engine starts but dies
• Fuel economy is reduced
• Engine cranks fine but does not start
• Engine dies when reaching operating temperature

• Issues with the fuel pump itself
• Severed or damaged ground wire in the device's control module
• Unattached ground strap in the control module
• Open, shorted, or corroded wiring in the CAN bus
• A faulty CAN bus
• Unsecured harnesses and wires causing a chafe or broken circuit
• High resistance in circuit (e.g. melted/corroded connectors, internal wire corrosion)

This particular trouble code is a moderately severe problem for your vehicle. You can still utilize your vehicle despite the problem. However, it is highly advised to avoid doing so, because you may risk intermittently delivering fuel to the engine and an erratic or fluctuating fuel mixture could definitely result in severe engine damage.