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What causes service 4wd light to come on in a 2006 hummer h2


Could be any number of thing's , having the 4X4 control module checked for code's is the first thing you should do , before just replacing parts. Do you know what a DTC is ? Diagnostic trouble code .
DTC B0790
DTC B2725
DTC C0306
DTC C0327
DTC C0329
DTC C0359
DTC C0550

Apr 13, 2018 | Hummer Cars & Trucks

1 Answer

04 s10 wont go into 4wd hi 4wd lo works


Does your vehicle have three or four button shift switch ?
The NVG 236 transfer case features a 4 button shift control switch located on the instrument panel.
OR
The NVG 233 transfer case features a 3 button shift control switch,
The transfer case shift control module is equipped with the ability to store diagnostic information, which is useful to a technician in the event of module, component or wiring failures. This information can be retrieved from the transfer case shift control module by way of flash codes, which are displayed on the three transfer case shift control switch buttons. These buttons are located on the instrument panel to the right of the steering wheel Before obtaining DTCs, perform the following transfer case control module (TCCM) Self-Test.
TCCM Self-Test
Observe the transfer case shift control switch indicators while turning the ignition switch to RUN. A properly operating system will flash all indicators and then will return to the current gear. If the system is operating normally, then proceed to Displaying Codes.
If the TCCM failed the Self-Test, then test the following circuits.
• Battery Positive Voltage (40 and 1640), and Ignition 3 Voltage for battery voltage
• Ground Circuit for ground
• Diagnostic enable circuit for an open or high resistance
• Transfer case shift control switch connector
If the above circuits are normal but the TCCM still fails the Self-Test, replace the TCCM. Refer to Transfer Case Shift Control Module Replacement .

DTC Displaying
Turn OFF the ignition for 10 seconds.
Connect PIN 13 on the data link cable (DLC) to a ground. The DLC is located in the cab under the instrument panel on the driver's side.
Turn ON the ignition, with the engine OFF.
Observe the transfer case shift control switch select buttons for flashing codes. Refer to Diagnostic Trouble Code (DTC) List .
Important: If the transfer case shift control switch buttons all blink only once and then stop, no fault codes are stored in the transfer case shift control module.
• When one DTC is stored in memory, that code will blink that number of times followed by a 3 second pause and then repeat.
• If more than one code is stored, the first code will blink, followed by a 3 second pause and then the second code will blink.
• This sequence will continue until PIN 13 on the DLC is no longer grounded.
• If the TCCM will not communicate the presence or absence of DTCs, test the above circuits in Self-Test Step 2. If the circuits are complete, then replace the TCCM. Refer to Transfer Case Shift Control Module Replacement .

The four button switch system is a bit more complex ,need a factory scanner or professional one to check DTC'S

DTC B2725
DTC C0300
DTC C0305
DTC C0308
DTC C0309
DTC C0310
DTC C0315
DTC C0323
DTC C0324
DTC C0327
DTC C0362
DTC C0367
DTC C0374
DTC C0376
DTC C0387
DTC C0550
DTC C0611
this is where you should start ,checking code's .

Dec 24, 2017 | Cars & Trucks

1 Answer

I have a 2004 Buick Rendevouz, and am having a problem with the Passkey 3 system not engaging the starter. clicks inside the vehicle at two relays and at BCM. starter works with wire to battery


How do you know it's a passkey 3 anti-theft system problem ? Light lit on the insturment cluster ? Padlock car symbol . If the security light is lit ,do you have a scan tool that can read these codes
DTC B2960
DTC B3031
DTC B3055
DTC P1626
DTC P1629
DTC P1630
DTC P1631

Not a code reader for the Engine OBD 2 codes .

Aug 23, 2017 | Buick Cars & Trucks

1 Answer

2005 chevy malibu damage Light front end damcodend error codes P0401 P0605 P0842 P0642 The 0401 code is being thrown twice and I belive it is the egr wich is common on these cars from what my buddy tells...


DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
Probably plugged passage's , not the EGR valve .
What type code reader are you using to read these codes ? I have factory service info. Doesn't show P0842 or P0642 , no such codes . You don't show what engine yours has , I'am assuming you have 3.5 L !
P0604
Control Module Random Access Memory (RAM)
PCM
DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 2.2L (L61)
or
DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 3.5L (LX9)

P0717
Input Speed Sensor Circuit Low Voltage
PCM
DTC P0717 in Automatic Transaxle - 4T40-E/4T45-E
P0741
Torque Converter Clutch (TCC) System - Stuck Off
PCM
DTC P0741 in Automatic Transaxle - 4T40-E/4T45-E
P0742
Torque Converter Clutch (TCC) System - Stuck On
PCM
DTC P0742 in Automatic Transmission - 4T40-E/4T45-E
P0748
Pressure Control (PC) Solenoid Control Circuit
PCM
DTC P0748 in Automatic Transmission - 4T40-E/4T45-E
P0751
1-2 Shift Solenoid (SS) Valve Performance - No First or Fourth Gear
PCM
DTC P0751 in Automatic Transmission - 4T40-E/4T45-E
P0752
1-2 Shift Solenoid (SS) Valve Performance - No Second or Third Gear
PCM
DTC P0752 in Automatic Transmission - 4T40-E/4T45-E
P0753
1-2 Shift Solenoid (SS) Control Circuit
PCM
DTC P0753 in Automatic Transmission - 4T40-E/4T45-E
P0756
2-3 Shift Solenoid (SS) Valve Performance - No First or Second Gear
PCM
DTC P0756 in Automatic Transmission - 4T40-E/4T45-E
P0757
2-3 Shift Solenoid (SS) Valve Performance - No Third or Fourth Gear
PCM
DTC P0757 in Automatic Transmission - 4T40-E/4T45-E
P0758
2-3 Shift Solenoid (SS) Control Circuit
PCM
DTC P0758 in Automatic Transmission - 4T40-E/4T45-E
P0815
Upshift Switch Circuit
PCM
DTC P0815 in Automatic Transmission - 4T40-E/4T45-E
P0816
Downshift Switch Circuit
PCM
DTC P0816 in Automatic Transmission - 4T40-E/4T45-E
P0826
Up and Down Shift Switch Circuit
PCM
DTC P0826 in Automatic Transmission - 4T40-E/4T45-E
P0973
1-2 Shift Solenoid (SS) Control Circuit Low Voltage
PCM
DTC P0973 in Automatic Transmission - 4T40-E/4T45-E
P0974
1-2 Shift Solenoid (SS) Control Circuit High Voltage
PCM
DTC P0974 in Automatic Transmission - 4T40-E/4T45-E
P0976
2-3 Shift Solenoid (SS) Control Circuit Low Voltage
PCM
DTC P0976 in Automatic Transmission - 4T40-E/4T45-E
P0977
2-3 Shift Solenoid (SS) Control Circuit High Voltage
PCM
DTC P0977 in Automatic Transmission - 4T40-E/4T45-E

Sometimes with code readers they get confused an just throw any old codes . Have it checked by someone with GM Tech 2 scan tool .

Aug 03, 2017 | Chevrolet Malibu Cars & Trucks

1 Answer

I put another abs moule on my 2002 Cadillac and lights are still on how do I clear the lights


Have the codes checked ! Do you know what codes are ,What the light is for ? The light is to warn the driver that there is a problem in the ABS system . Have the codes checked before replacing parts ,the code will point you in the direction to go .This system can set numerous DTC'S
DTC C1211 DTC C1214 DTC C1217 DTC C1218 DTC C1221-C1235 DTC C1236 DTC C1237 DTC C1238 DTC C1242 or C1243 DTC C1248 DTC C1251 (w/F45) DTC C1254 DTC C1255 or C1256 DTC C1261-C1274 DTC C1276, P1644, or P1689 DTC C1277 or P1571 DTC C1278 DTC C1281, C1283, or C1286 DTC C1282 DTC C1284 or C1285 DTC C1287 or C1288 DTC C1291 or C1293 DTC C1294 DTC C1295 Maybe your best bet would be to take your vehicle to a ASE certified repair shop or the dealer

Jan 10, 2016 | 2002 Cadillac Deville

1 Answer

What's the actual meaning of DTC codes 41, and 58, for this vehicle?


the meaning of codes 41 and 58 is:

DTC - 41 Ignition control error

DTC - 41 MEM- CAL error
DTC - 41 Cam sensor sinal error

DTC - 58 Trans fluid temp sensor circuit error (low voltage)
DTC - 58 VATS System error

I hope this is helpful

Feb 18, 2013 | 1992 Buick LeSabre

1 Answer

How do you reset the security light on a 2005 chevy cobalt?


There is no reset , if security light is lit there is a problem with the anti-theft system .Should have it checked for DTC'S - diagnostic trouble codes . Could have 8 different B - codes
DTC B0685 DTC B2955 DTC B2960 DTC B3031 DTC B3033 DTC P1626 DTC P1630 DTC P1631
You would need a professional type scan tool to read these type codes , not an OBD 2 code reader .

Apr 14, 2012 | Cars & Trucks

1 Answer

Code po120 mazda protege 1.5 L..code po110...code po115.....code po195



P0110 DTC - IAT Circuit Malfunction

P0115 DTC - Engine Coolant Temperature Circuit Malfunction

P0120 DTC - TPS A Circuit Malfunction

P0195 DTC - Engine Oil Temperature Sensor Malfunction

Hope this helps to identifiy.

Oct 04, 2011 | Cars & Trucks

1 Answer

2002 Buick LeSabre ECM DTC codes


P14xx and P15xx Diagnostic Trouble Codes?????????? You say has no DTC'S ???? What ?????

006 O2 Sensor Signal Analysis
What are the fuel trims at ? add fuel ,taking it away . Are the O2 sensors switching ?
What does scan data show the mass air flow sensor doing ?
010 Mass Air Flow Signal Analysis

006 Fuel Pump Current Testing Fuel pressure is AOK ??? fuel flow ?

035 Emission Tests Lean Fuel Condition

002 Fuel System Tests Start Here
DTC P1404
DTC P1441
DTC P1635
DTC P1639
DTC P1640
DTC P1650
DTC P1660
DTC P1670




Jul 24, 2017 | 2002 Buick Rendezvous

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