Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 2011 Chevrolet Silverado HD2500 with a check engine…

Customer Question
Hello! I have a 2011...
Hello! I have a 2011 Chevrolet Silverado HD2500 with a check engine light code P163C. I believe it is the glow plug circuit. could you please guide me through some diagnostics to determine if it is a glow plug or controller. Thanks! Lance Laranjo Retired GM Tech
Submitted: 3 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 4 minutes by:
12/31/2017
Chevy Mechanic: Roy, import/domestic specialest replied 3 months ago
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,288
Experience: ASE master tech for 40 years
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 3 months ago

ok, below is the flow chart for you.

I would start by verifying battery voltage to the controller itself. look for good clean connections

Roy

Circuit/System Description

The glow plug control module has the ability to perform internal diagnostics for voltage and output state of the glow plugs. The glow plug control module monitors the battery voltage of the module's main voltage supply circuit, the Ignition 1 Signal circuit and the engine control module (ECM) Control Module Voltage circuit. If the glow plug control module detects a difference between the glow plug control module main battery supply circuit and the Ignition 1 Signal circuit greater than 5 V the DTC will set or if the module detects a difference of 3 V between the glow plug control module main battery supply circuit and the ECM Control Module Voltage circuit. The glow plug control module will send a message to the ECM to set this DTC.

Conditions for Running the DTC

* The ignition is ON.
* DTC P163C runs continuously.

Conditions for Setting the DTC

The glow plug control module detects a variation between the battery positive voltage circuit to the glow plug control module, Ignition 1 signal circuit, and/or the ECM voltage circuit for 130 ms. The following conditions will set the DTC:

* Glow plug control module battery positive voltage circuit is greater than 16.5 V, and ignition 1 signal circuit is between 9-14 V.
* Glow plug control module battery positive voltage circuit is less than 6 V, and ignition 1 signal circuit is between 9-16 V.
* The difference between the glow plug control module battery positive voltage circuit, and ignition 1 signal circuit is greater than 5 V during glow plug operation.
* The difference between the glow plug control module battery positive voltage circuit and the ECM voltage circuit is greater than 3 V during glow plug operation.

Action Taken When the DTC Sets

DTC P163C is a Type B DTC.

Conditions for Clearing the DTC

DTC P163C is a Type B DTC.

Diagnostic Aids

Intermittent or poor connection of the B+ cable at the glow plug control module terminal X1 may cause this DTC to set.

Reference Information
Schematic Reference

Engine Controls Schematics (See: Powertrain Management > Electrical > Engine Controls Schematics)
Connector End View Reference

Component Connector End Views (See: Vehicle > Connector Views > Connector End Views By Name)
Description and Operation

Glow Plug System Description (See: Glow Plug System > Components > Glow Plug System Description)
Electrical Information Reference

* Circuit Testing (See: Vehicle > Component Tests and General Diagnostics > Circuit Testing)
* Connector Repairs (See: Vehicle > Component Tests and General Diagnostics > Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Vehicle > Component Tests and General Diagnostics > Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Vehicle > Component Tests and General Diagnostics > Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions > Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (See: Vehicle > Programming and Relearning > Control Module References) for scan tool information

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6-15 V.

♦ If not within the specified range, refer to Charging System Test (See: Starting and Charging > Component Tests and General Diagnostics > Charging System Test).

2. Verify the scan tool ECM Voltage parameter reading is between 12.6-15 V.
3. Verify the scan tool glow plug control module Ignition 1 Signal parameter reading is between 12.6-15 V.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the K34 glow plug control module.
2. Measure and record the voltage between the battery positive voltage circuit terminal 1 of the X1 harness connector and ground. The voltage should be B+.

♦ If voltage is not B+, repair the open or high resistance in the battery positive voltage circuit.

3. Disconnect the X2 harness connector at the K34 glow plug control module.
4. Ignition ON, measure and record the voltage between the Run/Crank Ignition 1 Voltage circuit terminal 33 of the X1 harness connector and ground. The voltage should be B+.

♦ If voltage is not B+, repair the open or high resistance in the Run/Crank ignition 1 voltage circuit.

5. Measure and record the voltage between the B+ and the signal ground circuit terminal 10. The voltage should be B+.

♦ If voltage is not B+, repair the open or high resistance in the signal ground circuit.
♦ If all circuits test normal, replace the K34 glow plug control module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Diagnostic Repair Verification) after completing the diagnostic procedure.

Control Module References (See: Vehicle > Programming and Relearning > Control Module References) for glow plug control module replacement, programming, and setup.

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 3 months ago

do you have any other questions???

Roy

Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

Ask Your Own Chevy Question
Was this answer helpful?
Ask Roy Your Own Question
Roy
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,288
7,288 Satisfied Customers
Experience: ASE master tech for 40 years

Roy 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

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 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

2,918 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Lifter gets stuck occasionally resulting in check engine
Lifter gets stuck occasionally resulting in check engine light flashing and shaking … read more
Anthony Uzmack
Anthony Uzmack
ASE Certified Service Technician
Automotive Technology
40 satisfied customers
Engine shuts off an on while interior electronics do the
Engine shuts off an on while interior electronics do the same while driving. Loss of ground? … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I went to leave for work this morning and the engine barely
Hi, I went to leave for work this morning and the engine barely turned over like the battery was really low almost dead so to speak. It did start but the voltage went so low the dash clock reset at 12… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
When driving down the road with little pull on the engine,
when driving down the road with little pull on the engine, it will start to surge. The rpms flux 2-4 rpms up and down. I put a new MAF sensor on it, but it did not help. There is no check engine light… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Replaced the battery, the engine will not turn over or crank
Replaced the battery, the engine will not turn over or crank when I turn the key to start, no noise (clicking) but the lights work. I checked the ignition fuse under the steering wheel it wasn't blown… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Engine power is reduced light is on and engine power is
Engine power is reduced light is on and engine power is reduced … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Check engine light flashing when driving past 40 mph, engine
Check engine light flashing when driving past 40 mph, engine vibrating when idle or moving slowly, slight delay of starting up engine, and car has trouble accelerating as fast as it used to do. … read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,734 satisfied customers
Is the Chevy Tracker 2.6 liter an interference engine.
Is the Chevy Tracker 2.6 liter an interference engine. … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
My 8.1 vortex chev engine in a 5500 truck. 2004. The engine
My 8.1 vortex chev engine in a 5500 truck. 2004 . The engine quits like you shut it off it restarts right away and runs good. This happened 7 times in 200 miles. … read more
Roy
Roy
import/domestic specialest
7,288 satisfied customers
The 1983 Chevy C10 305 engine will not start. this is the
The 1983 Chevy C10 305 engine will not start. Roy this is the truck that has had a rebuilt engine installed, new alternator, starter and every other part I could think of replacing by a mechanic. Now … read more
Roy
Roy
import/domestic specialest
7,288 satisfied customers
2003 chevy silverado 4.8 engine reduced engine power light
2003 chevy silverado 4.8 engine reduced engine power light comes on no power … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
Running engine stops or attempt to start engine fails, in a
Running engine stops or attempt to start engine fails, in a manner consistent with fuel starvation. Recently solved by installation of new fuel pump/sender unit, Problem has resumed approx two months … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Engine rattle noise when cruising on V4 to V8. Front engine;
engine rattle noise when cruising on V4 to V8 JA: Where exactly do you think the noise is coming from? And how long has this been going on? Customer: Front engine; 3-4 weeks JA: What is the model/year… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
Check engine light is on and autozone checked with their
check engine light is on and autozone checked with their computer code P2135 then it triggered code P0017. For P0017 this was already addressed as they changed a part for it already. … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
The check engine light is on. The code is P1810. It is a
The check engine light is on. The code is P1810. It is a 2006 Chevy 1500. … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Started engine with remote! Engine ran for about ten seconds
Started engine with remote! Engine ran for about ten seconds died,tried with the key won't start ! Checked fuel pressure on a shrader valve ! No fuel!? … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
89 satisfied customers
1989 5.7 liter throttle body engine. I was driving, engine
1989 5.7 liter throttle body engine. I was driving, engine was running fine, and came to stop sign. Upon trying to accelerate from the stop, the engine would hardly run. Bad miss and backfire visible … read more
rpmdiag
rpmdiag
High school
7,513 satisfied customers
The reduce engine message and the engine light on and alot
the reduce engine message and the engine light on and alot if shacking when I started it this morning … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 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