Reduced engine power - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Camaro2ss2010 · 06-17-2020, 12:28 PM

Today as I was sitting at a red light and the light turned green I took off and all of my dash lights came on(reduced engine power, stabilitrac and all other lights). My oil pressure gauge did not have a reading. I pull over and turn my car off. Let us sit for a few minutes and crank it back up. All lights gone except check engine light. Oil pressure was reading correctly again. Took off and within 1 minute it said reduced engine power again but the oil pressure read correct. I have a 2010 SS with the LS3. It has the list of mods in my signature. Haven’t taken it to get the codes read yet as I am waiting on the performance shop to call me back that built it less than two months ago. Any ideas on what could cause it.

InFiD3ViL · 06-17-2020, 12:42 PM

It could be a few different things. Loss of displayed oil pressure should trigger a Reduced Power mode, but you are getting it now without loss of pressure...

Oil pressure sensor failure (happened to me), oil pump pressure relief valve and/or spring issue, wiring issue (chaffed wire or ground issue), or possibly other electrical issues.

There are other mechanical issues that can cause it as well and I am sure others will chime in with info. You should get hold of a scanner and check your codes to see if you generated anything. When my sending unit failed I was getting a P0523 - 'Engine oil pressure sensor/switch - high voltage', which normally points to the sensor or wiring, not the pump. This way you know what direction to go in.

HDRDTD · 06-17-2020, 01:09 PM

How old is your battery?
All sorts of weird things pop up when the battery starts to go.
Not like the old days when the signs of a weak battery would begin with the engine cranking over slow.

Camaro2ss2010 · 06-17-2020, 03:27 PM

Less than 2 years old.

joekono · 06-17-2020, 10:52 PM

Quote:

Originally Posted by HDRDTD

How old is your battery?
All sorts of weird things pop up when the battery starts to go.
Not like the old days when the signs of a weak battery would begin with the engine cranking over slow.

This is good to know.

InFiD3ViL · 06-17-2020, 11:29 PM

Quote:

Originally Posted by joekono

This is good to know.

Yep, these cars act possessed when the battery gets weak. But usually it will cause a Stabilitrak error. I haven't heard of it causing a Reduced Power Mode or oil pressure gauge reading zero. But, always a possibility with these crazy electronics.

Greenhornet2 · 06-19-2020, 07:37 AM

You should be able to pull a code from history. Throttle body is a common issue.

Axe55 · 06-19-2020, 07:42 AM

I had reduced engine power a few weeks ago and the engine gave codes P2135 and P0300, it turned out to be the electronic sensor for the throttle pedal. When troubleshooting, it was likely either the pedal or the throttle body as Greenhornet mentioned. I replaced the pedal first because it was cheaper and that solved it.

Camaro2ss2010 · 06-24-2020, 11:28 AM

Called the performance shop to see if there was any headway on fixing the issue. The issue is 5 volt sensor reference “P0641”. They are trying to pinpoint what is going on. Any ideas on this?

InFiD3ViL · 06-24-2020, 12:49 PM

Unfortunately P0641 is kind of a generic 'placeholder' sensor communication error. If you do a Google search on the error and then change to 'Images', you get a sea of chewed up, melted, and corroded harnesses and connectors. It is the 'Short To Voltage' error for quite literally every single sensor on the car.

Hopefully it triggered an associated error as well so at least there was some sort of bread crumbs left for them to follow. I'm sure they will find it if the shop has a good tech with experience on troubleshooting electronics. Unfortunately these issues can take a lot of time to narrow down.

Camaro2ss2010 · 06-24-2020, 01:19 PM

Quote:

Originally Posted by InFiD3ViL

Unfortunately P0641 is kind of a generic 'placeholder' sensor communication error. If you do a Google search on the error and then change to 'Images', you get a sea of chewed up, melted, and corroded harnesses and connectors. It is the 'Short To Voltage' error for quite literally every single sensor on the car.

Hopefully it triggered an associated error as well so at least there was some sort of bread crumbs left for them to follow. I'm sure they will find it if the shop has a good tech with experience on troubleshooting electronics. Unfortunately these issues can take a lot of time to narrow down.

They have checked all wires and connectors with no luck yet. They are still working on it. There were no other codes thrown. Maybe he will get it figured out soon.

Mouse330 · 06-29-2020, 03:23 PM

This condition may be caused by intermittent conditions and poor connections or damaged terminals at the fuel pump control module wiring harness connector. Have them check this thoroughly

Rock-It Man · 06-29-2020, 03:43 PM

I would check to see if the battery terminals were properly installed when you replaced the battery two weeks ago.

Camaro2ss2010 · 06-29-2020, 08:33 PM

Quote:

Originally Posted by Mouse330

This condition may be caused by intermittent conditions and poor connections or damaged terminals at the fuel pump control module wiring harness connector. Have them check this thoroughly

2 more days and it will be 2 weeks. They have looked everywhere for it. Still no luck

06-17-2020, 12:28 PM	#1
Camaro2ss2010 Drives: 2010 Camaro 2SSRS M6 Join Date: Jan 2019 Location: Alabama Posts: 1,249	Reduced engine power Today as I was sitting at a red light and the light turned green I took off and all of my dash lights came on(reduced engine power, stabilitrac and all other lights). My oil pressure gauge did not have a reading. I pull over and turn my car off. Let us sit for a few minutes and crank it back up. All lights gone except check engine light. Oil pressure was reading correctly again. Took off and within 1 minute it said reduced engine power again but the oil pressure read correct. I have a 2010 SS with the LS3. It has the list of mods in my signature. Haven’t taken it to get the codes read yet as I am waiting on the performance shop to call me back that built it less than two months ago. Any ideas on what could cause it. __________________ ECS supercharger, custom ground cam, ported throttle body, long tube headers, aeromotive fuel pump, fic injectors, ATI super damper, Corsa Extreme exhaust, elite engineering catch can and many other things.

06-17-2020, 12:42 PM	#2
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,570	It could be a few different things. Loss of displayed oil pressure should trigger a Reduced Power mode, but you are getting it now without loss of pressure... Oil pressure sensor failure (happened to me), oil pump pressure relief valve and/or spring issue, wiring issue (chaffed wire or ground issue), or possibly other electrical issues. There are other mechanical issues that can cause it as well and I am sure others will chime in with info. You should get hold of a scanner and check your codes to see if you generated anything. When my sending unit failed I was getting a P0523 - 'Engine oil pressure sensor/switch - high voltage', which normally points to the sensor or wiring, not the pump. This way you know what direction to go in. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

06-17-2020, 03:27 PM	#4
Camaro2ss2010 Drives: 2010 Camaro 2SSRS M6 Join Date: Jan 2019 Location: Alabama Posts: 1,249	Less than 2 years old. __________________ ECS supercharger, custom ground cam, ported throttle body, long tube headers, aeromotive fuel pump, fic injectors, ATI super damper, Corsa Extreme exhaust, elite engineering catch can and many other things.

06-19-2020, 07:37 AM	#7
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	You should be able to pull a code from history. Throttle body is a common issue. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

06-19-2020, 07:42 AM	#8
Axe55 Drives: 2012 Camaro SS Join Date: Jun 2019 Location: Toronto Posts: 159	I had reduced engine power a few weeks ago and the engine gave codes P2135 and P0300, it turned out to be the electronic sensor for the throttle pedal. When troubleshooting, it was likely either the pedal or the throttle body as Greenhornet mentioned. I replaced the pedal first because it was cheaper and that solved it. __________________ 2012 Camaro SS LS3, JRE Scoop, CAI intake, Whipple Supercharger, Fast 85lb injectors, ZL1 pump, McLeod RXT clutch, MGW shifter, Stainless Power 1 7/8 headers w/HFC, Ridetech coilovers, BMR sway bars, trailing arms, toe rods, cradle bushing inserts, 2020 Speed Tuned.

06-17-2020, 01:09 PM	#3
HDRDTD Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011 Location: Trenton, Michigan Posts: 7,047	How old is your battery? All sorts of weird things pop up when the battery starts to go. Not like the old days when the signs of a weak battery would begin with the engine cranking over slow.

06-24-2020, 11:28 AM	#9
Camaro2ss2010 Drives: 2010 Camaro 2SSRS M6 Join Date: Jan 2019 Location: Alabama Posts: 1,249	Called the performance shop to see if there was any headway on fixing the issue. The issue is 5 volt sensor reference “P0641”. They are trying to pinpoint what is going on. Any ideas on this? __________________ ECS supercharger, custom ground cam, ported throttle body, long tube headers, aeromotive fuel pump, fic injectors, ATI super damper, Corsa Extreme exhaust, elite engineering catch can and many other things.

06-24-2020, 12:49 PM	#10
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,570	Unfortunately P0641 is kind of a generic 'placeholder' sensor communication error. If you do a Google search on the error and then change to 'Images', you get a sea of chewed up, melted, and corroded harnesses and connectors. It is the 'Short To Voltage' error for quite literally every single sensor on the car. Hopefully it triggered an associated error as well so at least there was some sort of bread crumbs left for them to follow. I'm sure they will find it if the shop has a good tech with experience on troubleshooting electronics. Unfortunately these issues can take a lot of time to narrow down. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

06-29-2020, 03:23 PM	#12
Mouse330 Drives: 2011 2SS, 2006 GMC Sierra Join Date: Jul 2019 Location: MA Posts: 239	This condition may be caused by intermittent conditions and poor connections or damaged terminals at the fuel pump control module wiring harness connector. Have them check this thoroughly

06-29-2020, 03:43 PM	#13
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,027 View My Garage	I would check to see if the battery terminals were properly installed when you replaced the battery two weeks ago.