Cranks but will not start?

BEAUBIEN5

MEMBER
2009 DODGE CALIBER
2.0L
4 CYL
2WD
AUTOMATIC
121,000 MILES

I was running errands and it was running fine. I parked it, did what I needed to do then when I came out and it would not start. Got it towed home found the fuel pump was faulty got it changed and it still won't start. I have already changed the crank position sensor had a recent oil change and tune up. Fuel pump works and the fuses look fine. Recent alternator and battery as well. The only code is P127F.

Tuesday, January 3rd, 2023 AT 4:48 PM

5 Replies

JACOBANDNICKOLAS

MECHANIC
110,052 POSTS

Hi,

Did you confirm the fuel pressure is within the manufacturer's specifications? If not, do that first.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

As far as the issue, I suspect you are getting fuel, but not enough pressure to run the vehicle. That is why I'm suggesting the pressure test.

The code you provided is related to an electrical issue and not the pump itself.

If you look at the attachments below, they provide the diagnostics specific to this code. Take a look and let me know if this is something you feel comfortable performing.

Take care and let me know what I can do to help.

Joe

See pics below.

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Tuesday, January 3rd, 2023 AT 9:07 PM

BEAUBIEN5

MEMBER
3 POSTS

I found intermittent power to the pump and no fuel to the rail. It'll run on ether. Unfortunately, I feel it's the internal fuel pump relay.

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Thursday, January 5th, 2023 AT 6:14 PM

JACOBANDNICKOLAS

MECHANIC
110,052 POSTS

Hi,

Are you referring to the TIPM? If you are, have you checked the pins in the connector or if there is power being provided?

Let me know.

Take care,

Joe

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Thursday, January 5th, 2023 AT 9:03 PM

BEAUBIEN5

MEMBER
3 POSTS

Intermittent power to the fuel pump. Both sides of the fuse test good though. I have not actually pulled the TIPM and checked the connectors and pins.

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Friday, January 6th, 2023 AT 10:03 AM

JACOBANDNICKOLAS

MECHANIC
110,052 POSTS

Hi,

I suspect that is where there is an issue. There are two connectors, C2 and C7. See pics 1 and 2 below.

Now comes the fun part. LOL Disconnect the battery before you do this. There are eleven connectors on the TIPM. To add insult to injury, both of the connectors you need to find are light gray. One is a 14-pin connector, and one has 22 pins.

If you look at pics 3 and 4, they show the connectors. I highlighted the pins to check. Note that the connector is the female end, and On the TIPM side, is the male connector. Check both but check the pins really closely for corrosion and make sure the pin isn't broken.

Let me know what you find.

Take care,

Joe

See pics below.

Images (Click to make bigger)