Engine/Transmission (1998.5 - 2002) Po230

[Smokin' Larry]

Hi guys. Very recenyly I had to replace my APPS module on 01.5. Not 48 hours later I get the po230. I need to get my smog cert. I'm in California. I have a juice with attitude but cannot clear this code. Is it time for a fresh fuel pump? After The new APPS the truck runs sweet in first qtr. throttle. I got the aftermarket APPS module from Geno's. If It's time for a fueL Pump it's on I'm getting one. Thanks guys

 

[BoeingDiesel]

If memory serves, I think the P0230 DTC points to the lift pump. I don't see gauges listed in your sig,,,have you checked your fuel pressure? Also, check the elec. connections to the lift pump and resistance.

 

[Smokin' Larry]

I have an Edge Juice w/Attitude in my truck so I have gauges and fuel pressure is a strong 13/14 at light throttle and about 5/8 under acceleration. When we installed the new APPS we calibrated per instructions but we'll go back and check as you suggest. Thank you

 

[DavidC]

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P0230 code definition

Fuel Pump Primary Circuit Malfunction
What the P0230 code means

P0230 is a generic OBD-II code which indicates that the fuel pump primary circuit has a malfunction of the vehicle power to the fuel pump when it is commanded on or off
What causes the P0230 code?

The engine control module (ECM) detects the primary fuel pump circuit voltage as below specifications from the fuel pump relay to the ECM

The fuel pump relay main power supply could be low from a blown fuel pump fuse or fusible link, or from a shorted fuel pump or circuit

What are the symptoms of the P0230 code?

The Check Engine Light will be illuminated

The fuel pump may become inoperative if the fuel pump and relay is bad

The engine may not start from a lack of fuel pump operation

How does a mechanic diagnose the P0230 code?

Scans codes and documents the freeze frame data in order to verify the problem

Clears the DTC codes to verify whether the concern comes back

Checks the fuel pump fuse or fusible link to see if it is blown

Tests voltage to the fuel pump relay primary circuit to be battery voltage

Tests fuel pump relay primary circuit resistance for an open circuit

Common mistakes when diagnosing the P0230 code

Follow these simple guidelines to prevent misdiagnosis:

Verify that the battery voltage is within specifications and connections are good

Check the electrical connections at the fuel pump relay for overheating from a fuel pump drawing too much power and overheating the circuit

How serious is the P0230 code?

The fuel pump primary circuit powers the fuel pump relay and can cause a no start

A low battery voltage can trigger the code if the voltage falls below a specified level

The fuel pump may be drawing too much power and cause the low voltage condition

What repairs can fix the P0230 code?

Repairing or replacing the fuel pump fuse or fusible link, and replacing the fuel pump
Replacing the fuel pump relay
Replacing the fuel pump only

Additional comments for consideration regarding the P0230 code

Code P0230 is triggered by low voltage in the main power circuit of the fuel pump relay. The ECM monitors this voltage to see if it falls below a specified voltage.

If codes P0231 or P0232 are present, then follow the pinpoint tests for these codes first to narrow down the failure on the secondary side of the fuel pump circuit.

 

[BoeingDiesel]

I read somewhere to check for resistance and if below 5 ohm there's the problem.

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I feel your pain in getting ready for the CA smog issue as I keep my '99 in CA and I'm [AGAIN] dealing with the P1740 code

 

[Smokin' Larry]

no fuel pressure

When I started the truck for the cold start today 0 fuel pressure. Shut down and I'm gonna put a pump in it. Will check all circuits and performance with new pump. Going to relocate pump to rear while I'm doing it. Funny on the first start of the day the pressure never even came up. That's why I have a pressure gauge. Thanks you guys.

 

[Smokin' Larry]

Hi guys the truck's running. The fuel pump had died. It was the original. I sent it to the shop because my current health condition makes me too weak to do it myself. But after a week it wasn't ready yet. I got the relocation kit with DDRP pump. Turns out the tech. had never done one before and was hesitant. On the sixth day my best friend told" if it's not ready tomorrow have it towed my house". My best friend did the job for me. About 8:30p it was running with no less than10# and up to 22# fuel pressure. Best friends are priceless!!!!