Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

P003a code, P003a--states that the turbo charger must go

Customer Question
p003a code JA: Just to clarify...
p003a code
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: P003a--states that the turbo charger must go thru a relearn. There were two codes first. the P003a and the P2563-00. However, after clearing the codes and then finding the first code to come back.
JA: What is the model/year of your Chevy?
Customer: 06 GMC 3500
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I just bought the truck and while driving home, the check engine light lit. I was told by the dealer to clear the codes and see what comes back. I have scanners, but not one that has the capability to relearn the turbo
JA: Anything else you think the mechanic should know?
Customer: The dealer that I bought the truck from is 200 miles away. I am trying to solve the issue myself, but would take the truck back to the dealer and have him fix it. I am a car mechanic and familiar with scan tools but not a diesel mechanic.
Submitted: 1 year ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 13 hours by:
8/23/2016
Chevy Mechanic: Pete, Auto Service Technician replied 1 year ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 29,570
Experience: 14 years GM dealer Technician.
Verified

My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

This may be a failed component like the turbo charger itself when these codes set which can be common.Here is the diagnostic procedure for the P003a code.You may want the dealer to diagnose and repair this if it is a failed turbo.

Circuit/System Verification

1. If DTC P0652, P0653, P0698, P0699, P2564, or P2565 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions > Diagnostic Trouble Code (DTC) Type Definitions.
2. Engine running, increase the engine speed to 1,500 RPM and maintain. Command the TC Vane Pos. Ctrl. Solenoid ON and OFF with a scan tool. Observe the Vane Position Sensor parameter. The TC Vane Position Sensor parameter should increase to 95-97 percent and decrease to near 0 percent when commanded ON and OFF.
3. Engine running, observe the TC Vane position Sensor and the Desired TC Vane Position parameters with a scan tool. Slowly increase the engine speed from idle to 2,500 RPM, and slowly return the engine to idle speed. The TC Vane Position Sensor parameter should remain near or equal to the Desired TC Vane Position parameter throughout the engine speed range.
4. Engine running, observe the TC Vane Position Sensor and the Desired TC Vane Position parameters while increasing the TC vane position in 5 percent increments from 0-100 percent with a scan tool. The parameters should remain within 2 percent of each other during the entire range.
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Ignition OFF, for 90 seconds, disconnect the harness connector at the TC control solenoid.
2. Ignition ON, verify that a test lamp illuminates between the TC high control circuit terminal A and ground.
- If the test lamp does not illuminate, test the high control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
3. Connect the J 34730-405 between the high control terminal A and the low control circuits terminal B.

Note: When the engine coolant temperature is less than 70°C (158°F), the test lamp will change brightness when commanded with a scan tool. When the ECM is attempting a TC Learn, the test lamp will flash ON and OFF without commands from a scan tool.

4. Engine running, engine coolant temperature (ECT) sensor 1 must be less than 70°C (158°F). Command the TC Vane Pos. Ctrl. solenoid ON and OFF with a scan tool. The test lamp should illuminate and change from bright to dim when changing between the commanded states.
- If the test lamp does not illuminate, test the low control circuit terminal B for an open/high resistance or a short to voltage. If the circuit tests normal, replace the ECM.
- If the test lamp remains illuminated, test the low control circuit terminal B for a short to ground. If the circuit tests normal, replace the ECM.

Note: The resistance of the TC control solenoid will vary with the temperature.

5. Ignition OFF, measure the resistance of the TC control solenoid. The reading should be between 3-7 .
- If the resistance is not within the specified range, replace the TC control solenoid.
6. Test for infinite resistance between each TC control solenoid terminal and the TC control solenoid housing.
- If less than infinite resistance, replace the TC control solenoid.
7. Disconnect the harness connectors at the ECM, and TC vane position sensor.
8. Test for less than 5 on all turbocharger sensor and solenoid circuits between the following terminals:
- The ECM X1 TC solenoid high control circuit terminal 48 to TC control solenoid terminal A.
- The ECM X1 TC solenoid low control circuit terminal 96 to TC control solenoid terminal B.
- The ECM X1 TC sensor signal circuit terminal 20 to TC position sensor terminal B.
- The ECM X1 TC sensor low reference terminal 63 to TC position sensor terminal C.
- The ECM X1 TC sensor 5 V reference terminal 13 to TC position sensor terminal D.
- If greater than the specified range, repair the high resistance in the affected circuit.
9. Connect the ECM connectors. Test the TC vane position sensor. Refer to Component Testing in this document for instructions.
10. Install and connect the TC vane position sensor.
11. Command the turbocharger TC Vane Position Sensor from 0 percent to 100 percent while observing the TC Vane Position Sensor Volts parameter. The voltage should increment smoothly and gradually from approximately 1.0 V at 0 percent to greater than 3.5 V at 100 percent.
- If the voltage parameter does not change gradually and smoothly, replace the TC control solenoid.
12. Inspect the turbocharger for debris, damage, or sticking vanes. Refer to Turbocharger Cleaning and Inspection See: Engine > Overhaul.
13. If all circuits, the TC control solenoid, and the TC vane position sensor tests are normal, replace the turbocharger assembly.

Component Testing

Note: You must perform the Circuit/System Testing before proceeding with the Component Testing.

TC Vane Position Sensor

1. Ignition OFF, remove the TC vane position sensor.
2. Connect the harness connector to the TC vane position sensor.
3. Ignition ON, slowly depress the button on the end of the TC vane sensor. Observe the TC vane position sensor parameter for a smooth decreasing percentage from 100-0 percent without any spikes or dropouts.
- If the TC Vane Position Sensor parameter does not increment smoothly, replace the TC vane position sensor.

Repair Instructions

- Turbocharger Vane Position Sensor Replacement See: Turbocharger > Procedures
- Turbocharger Control Solenoid Valve Replacement See: Turbocharger > Procedures
- Control Module References for ECM replacement, setup, and programming See: Turbocharger > Programming and Relearning

Repair Verification

1. Engine running, observe the scan tool TC Vane Position Sensor and the Desired TC Vane Position parameters. Slowly increase the engine speed to 2,500 RPM, and slowly return the engine speed to an idle. The TC Vane Position parameter should remain near or equal to the Desired TC Vane Position parameter.
2. Engine running, observe the scan tool TC Vane Position Sensor parameter while increasing the engine speed to 1,500 RPM and maintaining. Command the TC Vane Pos. Ctrl. Solenoid ON and OFF. The TC Vane Position Sensor parameter should increase to 95-97 percent when the TC solenoid is commanded ON, and decrease to near 0 percent when commanded OFF.
3. Engine running, observe the scan tool TC Vane Position Sensor and the Desired TC Vane Position parameters while increasing the TC vane position sensor in 5 percent increments from 0-100 percent. The TC Vane Position Sensor and the Desired TC Vane Position parameters should remain within 2 percent of each other during the entire range.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Ask Your Own Chevy Question
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 29,570
29,570 Satisfied Customers
Experience: 14 years GM dealer Technician.

Pete is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,249 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,196 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,847 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,900 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,682 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Check engine light is on... It spudders at an idel. And
Check engine light is on... It spudders at an idel. And sometimes doesnt start .. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
No power to fuel injectors when engine cranks. Fuel
no power to fuel injectors when engine cranks. Fuel injectors are brand new. rtruck runs when gas is poured into carborater. 1989 gmc suburban 350 motor … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,196 satisfied customers
The engine and traction control lights are on, and there is
The engine and traction control lights are on, and there is a "service traction" message on my 2011 Malibu. … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
2002 Chevy Blazer with 4.3 engine. Frequently will not start
2002 Chevy Blazer with 4.3 engine. Frequently will not start after setting overnight. Dribble a little gas in the intake and it fires up and runs fine. May or may not start after sitting a few hours. … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
The engine coolant light keeps coming on and the tank is
the engine coolant light keeps coming on and the tank is filled with water … read more
AZTechBrian
AZTechBrian
ASE Certified Technician & Shop Owner
Vocational, Technical or Trade School
732 satisfied customers
Engine is so hot burns plug wires Engine gets so hot outside
engine is so hot burns plug wires Engine gets so hot outside until it burns plug wires … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,931 satisfied customers
86 K10 temp. gauge goes to hot and engine dies, but engine
86 K10 temp. gauge goes to hot and engine dies, but engine is still cool … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
1996 chevy Silverado k2500 5.7 vortec engine engine light on
1996 chevy Silverado k2500 5.7 vortec engine engine light on po300 random misfire detected we replaced plugs wires Distributor cap and rotor pickup coil checked compression everything is good there ch… read more
Michael Solis
Michael Solis
252 satisfied customers
It will not start the engine will turn fine but will not
It will not start the engine will turn fine but will not start i replaced the fuel pump but it made no difference i also tried changing the fuel pump relay but that did nothing … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
Wash engine but do not start engine. Its ok. Everything is
wash engine but do not start engine JA: Have you checked the battery, particularly the terminal connections? Are they corroded? Customer: Yes its ok JA: What is the model/year of your Chevy? Customer:… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
I got a crate engine 10066038 in back of the engine i says
i got a crate engine 10066038 in back of the engine i says im0918 6vp can you tell me more about this engine? … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
My car won't start it says engine power reduced, engine
Hello my car won't start it says engine power reduced, engine disabled, and service esc … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Have a 2009 HHR, 2.4 L engine. Check engine light came on,
Have a 2009 HHR, 2.4 L engine. Check engine light came on, had scanned at AutoZone. Code P0010, with definition: intake camshaft position actuator solenoid, control circuit bank 1. Explanation:ECM has… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Check engine light, reduced engine power, service power
check engine light, reduced engine power, service power steering mesaages … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines.
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines. Now I have a P0300 check engine light code. Swapped out coil packs. Drive down the road perfectly. What do I do next?… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines.
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines. Enabled the crankshaft position variation learn procedure. Ran for 20 to 25 minutes. Won't start. Has spark and fuel pump is running. No inj… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
My 2006 sierra 3500 8.1 litre engine all of a sudden engine
My 2006 sierra 3500 8.1 litre engine all of a sudden engine light came on and would not go over 20 mph. Then turn off and run good till it warms up … read more
HDGENE
HDGENE
Master Technician/Lead Technician
Associate Degree
2,835 satisfied customers
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines.
2005 Chevrolet Aveo. 1.6 liter engine. Swapped out engines. Enabled the crankshaft position variation learn procedure. Ran for 20 to 25 minutes. Won't start. Has spark and fuel pump is running. No inj… read more
Pete
Pete
Auto Service Technician
29,570 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x