What Does P0628 Mean? The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. When you see P0628 engine fault code on your engine code reader this description will help you. engine code P0628P0628 fixobd P0628dtc P0628obd code P0628obd2 P0628P0628 car codediagnostic code P0628car code P0628check engine code P0628fehlercode P0628P0628 fiatcodigo P0628codigo falla P0628P0628 kody b??dówcodigo de falla P0628 What are the common causes of P0628 ? The most likely cause of this code being stored is a defective fuel pump or fuel pump relay. Most fuel pump control circuits are integrated into the PCM. Other causes may include corroded, open, or shorted wiring or connectors in the CAN Bus harness, a loose control module ground strap or broken ground wire, the CAN bus may also be defective. How do you troubleshoot P0628 ? If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Searches related to P0628 - Fuel Pump 'A' Control Circuit Low p0628 hino p0628 mitsubishi p0628 nissan navara trouble code p0628 p0628 code dodge diesel p0628 ford p0627