2006 hyundai sonata fuel pump relay inoperative

Question edited for clarity and correct order.
Question moved to model category.

There is an Inertia Switch, but that only activates if you crash at speed.

It is most likely the fuel pump relay. Lots of information in the link

https://www.google.com/search?q=2008+Hyundai+Sonata+3.3.+Fuel+pump+reset+button+location

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check the pump relay under the hood (bonnet)

No it doesn't . Has fuel pump relay controlled by the PCM - powertrain control module . The PCM needs to have inputs from crankshaft position sensor before it will energize the relay . Does the vehicle have spark at the sark plugs or coil's ? If there is spark the crank sensor is good . Would need to do fuel pump electrical circuit testing , like this
Testing Electric Fuel Pump Problems with Voltage Drop Test Look at the fuse / relay box under the hood in engine bay . Find fuel pump relay . Do you know about relays an how they work ? Videos on youtube .

causes could be - Faulty Vacuum hoses damaged
- Faulty Air Pump inoperative
- Air bypass solenoid harness is open or shorted
- Air bypass solenoid circuit poor electrical connection
- Air bypass solenoid leaking/blocked or stuck open/closed
- Air diverter valve leaking/blocked or stuck open/closed

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

there cud be a module-those cars are complex--send issue to [email protected] a master on any make and model

Trouble Code: P0230

Fuel Pump Circuit Malfunction
Possible Causes:


Fuel pump control circuit is open or shorted to ground Fuel pump relay power circuit from ignition switch is open Fuel pump relay is damaged or has failed PCM has failed

Check the fuel pump relay and or fuel pump fuse.

The fuse box is located low on the left side of the dashboard behind a cover, or at the left side kick panel, behind a cover.

Relay Box -is located under the left side of the dash as well.

The engine computer turns on the fuel pump for 3 seconds when you turn the key to "ON".
If the engine does not start, the pump will not run.
When you turn the key to "Start", the fuel pump runs all the time the key is held in start.
When you turn the key on, it actiavtes the power relay, which provides power to the PCM or engine computer.
The PCM then activates the fuel pump relay, sending power to the fuel pump.
You should have one wire with 12V for 3 seconds in "run" position. This comes from the fuel pump relay to the inertia switch in the trunk and then to the fuel pump.
You should have one ground wire. black
One wire going to the fuel guage.
You may have another ground iwre ging to a diode before going to ground.

usually located in the main fuse box under hood