Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

need help reading coads for obd1

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  #1  
Old 04-07-2013, 05:46 PM
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Default need help reading coads for obd1

i have a 95 chevy 2500 6.5 td i got it to pull coads but i dont know how to read them i made a video can someone plzz tell me what the coads are here is the link thanks
 
  #2  
Old 04-07-2013, 06:30 PM
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The codes are represented in the flashes of the ses light.
1 blink pause 2 blinks pause is code 12.
code 12 = normal operation-it will repeat 3 times and then each additional code will repeat 3 times finally ending with a repeating code 12.

The codes I saw were:
18,32,33,34,92,93,94 but you stopped too soon.

Go to your local auto parts store and get them to do a code check with a tool and write down the code #'s only-not the description.

DTC 12 - No Codes Present
DTC 13 - Engine Shutoff Solenoid Circuit Fault
DTC 14 - Engine Coolant Temperature (ECT) Sensor Circuit Low (High Temp)
DTC 15 - Engine Coolant Temperature (ECT) Sensor Circuit High (Low Temp)
DTC 16 - Vehicle Speed Sensor Buffer Fault
DTC 17 - High Resolution Circuit Fault
DTC 18 - Pump Cam Reference Pulse Error
DTC 19 - Crankshaft Position Reference Error
DTC 21 - Accelerator Pedal Position 1 Circuit High
DTC 22 - Accelerator Pedal Position 1 Circuit Low
DTC 23 - Accelerator Pedal Position 1 Circuit Range Fault
DTC 24 - Vehicle Speed Sensor Circuit Low (Output Speed Signal)
DTC 25 - Accelerator Pedal Position 2 Circuit High
DTC 26 - Accelerator Pedal Position 2 Circuit Low
DTC 27 - Accelerator Pedal Position 2 Circuit Range Fault
DTC 28 - Transmission Range Pressure Switch Circuit
DTC 29 - Glow Plug Relay Fault
DTC 31 - EGR Control Pressure/Baro Sensor Circuit Low (High Vacuum)
DTC 32 - EGR Circuit Error
DTC 33 - EGR Control Pressure/Baro Sensor Circuit High
DTC 34 - Injection Timing Stepper Motor Fault
DTC 35 - Injection Pulse Width Error (Time Short)
DTC 36 - Injection Pulse Width Error (Time Long)
DTC 37 - TCC Brake Switch Stuck "ON"
DTC 38 - TCC Brake Switch Stuck "OFF"
DTC 39 - TCC Stuck "OFF"
DTC 41 - Brake Switch Circuit Fault
DTC 42 - Fuel Temperature Circuit Low (High Temp)
DTC 43 - Fuel Temperature Circuit High (Low Temp)
DTC 44 - EGR Pulse Width Error
DTC 45 - EGR Vent Error
DTC 46 - Malfunction Indicator Lamp (MIL) Circuit Fault
DTC 47 - Intake Air Temperature Sensor Circuit Low (High Temp )
DTC 48 - Intake Air Temperature Sensor Circuit High (Low Temp )
DTC 49 - Service Throttle Soon Lamp Circuit Fault
DTC 51 - PROM Error
DTC 52 - System Voltage High Long
DTC 53 - System Voltage High
DTC 54 - PCM fuel circuit error
DTC 56 - Injection Pump Calibration Resistor Error
DTC 57 - PCM 5 Volt Shorted
DTC 58 - Transmission Fluid Temp Circuit Low
DTC 59 - Transmission Fluid Temp Circuit High
DTC 61 - Turbo Boost Sensor Circuit High
DTC 62 - Turbo Boost Sensor Circuit Low
DTC 63 - Accelerator Pedal Position 3 Circuit High
DTC 64 - Accelerator Pedal Position 3 Circuit Low
DTC 65 - Accelerator Pedal Position 3 Circuit Range Fault
DTC 66 - 3-2 Shift Control Solenoid
DTC 67 - TCC Solenoid Circuit (Open or Short)
DTC 68 - Transmission Component Slipping
DTC 69 - TCC Stuck "ON"
DTC 71 - Set/Coast Switch Fault (Cruise Control)
DTC 72 - Vehicle Speed Sensor Circuit Loss (Output Speed Signal)
DTC 73 - Pressure Control Solenoid Circuit (Current Error)
DTC 74 - Transmission Input Speed (TIS) Sensor Circuit
DTC 75 - System Voltage Low
DTC 76 - Resume/Accel Switch Fault (Cruise Control)
DTC 78 - Turbo Wastegate Solenoid Fault
DTC 79 - Transmission Fluid Over Temperature
DTC 81 - Transmission 2-3 Shift Solenoid Circuit
DTC 82 - Transmission 1-2 Shift Solenoid Circuit
DTC 83 - Torque Converter Clutch
DTC 85 - Transmission Gear
DTC 86 - Transmission Gear Ratio Error
DTC 87 - Transmission Gear Ratio Error
DTC 88 - Top Dead Center Offset Problem
DTC 91 thru 98 - Cylinder Balance
DTC 99 - Accelerator Pedal Position Sensor 5-Volt Reference Problem
 
  #3  
Old 04-07-2013, 06:59 PM
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what one of them would make my truck not get fuel
 
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Old 04-07-2013, 07:37 PM
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I can't say for sure because I didn't see the first code 12 or the last one,but the code 18 would cause problems as well as the 34 when it does run.

The missed cylinder codes along with the sear number of codes make me think you have ground problems at the back of the intake.
 
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Old 04-07-2013, 07:50 PM
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yea that ground broke off

---AutoMerged DoublePost---

how do i know when the truck is done with the codes i dont wanna seat there for ever and keep recording the same thing
 

Last edited by kylek; 04-07-2013 at 07:50 PM. Reason: Automerged Doublepost
  #6  
Old 04-07-2013, 08:38 PM
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IIRC there are 3 wires back there,often 2 wires on 1 ring terminal and 1 with its own ring.

Get them fixed and tight and clean and most problems will go away likely.

Code 12 will flash at the beginning and at the end to tell you it's done.
 
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Old 04-07-2013, 09:48 PM
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Old 04-07-2013, 09:52 PM
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Something is wrong,it should start with code 12.
Could be the ground problem?
 
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Old 04-07-2013, 10:09 PM
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idk i think my sending unit is geting clogged cuz i can get fuel out of the t valve if the truck is off and i jump the fuel pump relay but if i start the truck nothing comes out in the truck dies
 
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Old 04-07-2013, 10:52 PM
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OK when the truck is running the OPS powers the LP not the relay.
AC Delco ONLY for OPS replacement.

Google OPS relay mod and install it asap for long term reliability.

---AutoMerged DoublePost---

Did you fix the ground yet?
Once that is done undo the batteries for a couple of minutes on the ground side to clear the codes.

Start and run the truck for a while and if the SES light comes back on check the codes again.
 

Last edited by racer55; 04-07-2013 at 10:52 PM. Reason: Automerged Doublepost


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