2011 Buick Regal CXL p135a code (stalls like bad fuel pump)

[Turboregal2750]

So I got a 2011 Buick Regal Cxl -
Recently threw a code for MAF sensor.So o replace the sensor code goes away.Then I get. P135a code (ignition coil circuit supply) so I get new coils and spark plugs .Clear the code car drives like a champ .I get an oil change full tank of gas,car stalls out right after flll up .Been like this for a week now took it to a shop and the dealership says it could be electrical but symptoms seem like it might be the fuel pump …help
CODE p135a

 

[bugspop1]

Did you check for Codes again, or are you just remembering that code from the previous scan?
To me, it sounds like the gas stirred something up and is clogging the Fuel Filter, Fuel Pump of Injectors.
It could also be that you got ahold of some bad gas.
I think I do another Scan and see what's popping up this time.
It's just too coincidental that you started having the problems right after a Fill-up.

 

[Turboregal2750]

Did you check for Codes again, or are you just remembering that code from the previous scan?
To me, it sounds like the gas stirred something up and is clogging the Fuel Filter, Fuel Pump of Injectors.
It could also be that you got ahold of some bad gas.
I think I do another Scan and see what's popping up this time.
It's just too coincidental that you started having the problems right after a Fill-up.

That’s exactly what I was thinking fuel pump or fuel filter …I also have a Chevy Tahoe had the same issue stall out no power no gas getting through I’m gonna try to see if these help but could bad pump trigger p135a ? Doesn’t seem like my bcm is bad cause she drives great .thanks for your post

 

[bugspop1]

It is kind of hard to tell if your In-Tank Fuel Pump or the High Pressure Fuel Pump is giving
you the trouble as both have very similar symptoms.
Below are a couple links that may help:

codes for a bad in tank fuel pump in a 2011 buick regal cxl

codes on a 2011 buick regal cxl for a bad HPFP

 

[richardnewton]

I don't know about the p134a code.

1. The fill up seems to be the smoking gun for most cars. But there is a smallish probability it is a coincidence.

2. I will say that the older 2.4 engines have problems with the HPFP. Sometimes a code does not emerge. One check is the oil will smell like fuel (leaking gasket inside the HPFP). Another failure mode is the cam follower, which is not the best quality part. The cam could be trashed but that is rare. If you change the HPFP, buy the OEM part from the dealer only. Replace the cam follower as it is inexpensive and a smart idea. The metal high-pressure curly pipe must be changed as the seal is one time use.

3. There are both high & low fuel pressure fuel sensors that can fail. Neither is expensive but both can be difficult to reach. I think they are behind the intake manifold & closer to the driver, respectively but I think placement varied. Search my posts for codes and symptoms around those. I thought a good scan tool would show odd fuel pressures if those failed....but can't remember.

4. Finally, these engines are hyper-sensitive to oil level. I think the first victim is the timing set. Timing issues might show themselves if you hear a 1-second metalic sound on first start of the morning. Eventually, codes may pop up, the car runs poorly, the car stops running, etc.

Confusing matters, the 2011 2.4 Regals had two different timing schemes which is confusing. The dealer might know which timing your car has by VIN (some cars were upgraded..making the search less trivial).

https://static.nhtsa.gov/odi/tsbs/2015/MC-10114592-9999.pdf

5. Most of the modern 2.4 engines were on terrains so check out the terrainforums. You can also search the LaCrosse board here (some were hybrids but that probably doesn't matter one way or the other IMHO).

 

[bugspop1]

I just replaced the High Pressure Fuel Pump on my daughter's 2015 Chevy Equinox last month.
She did have a Check Engine Light, a Code and the vehicle went into Limp Mode.
Her Equinox has the 2.4L as does my wife's 2013 GMC Terrain.

I loaned my daughter my Regal for the day while I replaced her HPFP.
When it came time, she really didn't want to return my Regal!