i am getting to codes when i ground out the a&b port. I count the flashes. the first one is 55 and the second is 84. i did have a print out of all of them but i cant find it now i need it. if any knows what they are let me know thanks

 

DTC - 55 ECM error

there is no code 84

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here a list so next time need it


GM OBD-1 Diagnostic Trouble Codes
For 1995-previous model year EFI-equipped GM vehicles. NOTE: Some codes not supported on all models, consult your specific vehicle's service manual for the correct trouble code list and description for your application.
DTC - 12 No distributor reference pulse (diagnostic test active)
DTC - 13 Oxygen sensor circuit open or no activity
DTC - 13 Left bank O2 sensor circuit open or no activity
DTC - 14 Engine coolant temp sensor error (high temp indicated)
DTC - 15 Engine coolant temp sensor error (low temp indicated)
DTC - 16 System voltage too low
DTC - 17 Camshaft position sensor error
DTC - 21 Throttle Position sensor error (signal high)
DTC - 22 Throttle position sensor error (signal low)
DTC - 23 Intake air temp sensor error (low temp indicated)
DTC - 24 Vehicle speed sensor error (open circuit or no activity)
DTC - 25 Intake air temp sensor error (high temp indicated)
DTC - 26 Quad Driver Module (QDM A) error
DTC - 28 Auto transmission range pressure switch error
DTC - 31 Wastegate solenoid circuit error
DTC - 31 Gear Position Switch (PRNDL) error
DTC - 32 EGR system failure
DTC - 33 MAP sensor circuit error (signal high indicating low vacuum)
DTC - 34 MAP sensor circuit error (signal low indicating high vacuum)
DTC - 35 IAC problem or idle error
DTC - 36 MAF sensor error
DTC - 36 24x Crankshaft position sensor circuit error
DTC - 36 4T60-E Shifting Error
DTC - 37 TCC brake switch circuit error
DTC - 38 TCC brake switch circuit error
DTC - 39 Clutch switch circuit error
DTC - 39 TCC error
DTC - 41 Ignition control error
DTC - 41 MEM-CAL error
DTC - 41 C³I Cam Sensor Signal error
DTC - 42 Ignition bypass circuit error
DTC - 43 Knock sensor error
DTC - 44 Oxygen sensor error (lean condition indicated)
DTC - 44 Left bank O2 sensor error (lean condition indicated)
DTC - 45 Oxygen sensor error (rich condition indicated)
DTC - 45 Left bank O2 sensor error (rich condition indicated)
DTC - 46 Pass-Key II (VATS) system error - circuit out of freq range
DTC - 47 UART (serial data) circuit error
DTC - 51 PROM error
DTC - 51 Incorrect MEM-CAL
DTC - 52 Fuel cal-pak incorrect or missing
DTC - 53 System voltage too high
DTC - 53 Digital EGR Valve solenoid 1 error
DTC - 54 Fuel pump circuit low voltage
DTC - 54 Digital EGR Valve solenoid 2 error
DTC - 55 ECM error
DTC - 55 Digital EGR Valve solenoid 3 error
DTC - 56 Quad Driver Module (QDM B) error
DTC - 57 Boost Control error
DTC - 58 Trans fluid temp sensor circuit error (low voltage)
DTC - 58 VATS system error
DTC - 59 Trans fluid temp sensor circuit error (high voltage)
DTC - 61 A/C system performance
DTC - 63 Right bank O2 sensor circuit error
DTC - 63 MAP sensor circuit signal voltage high (low vacuum indicated)
DTC - 64 Right bank O2 sensor lean exhaust indicated
DTC - 64 MAP sensor circuit signal voltage low (high vacuum indicated)
DTC - 65 Right bank O2 sensor rich exhaust indicated
DTC - 66 A/C pressure sensor circuit error (low pressure indicated)
DTC - 67 A/C pressure sensor circuit error
DTC - 68 A/C clutch relay circuit error (shorted to ground)
DTC - 69 A/C clutch relay circuit error (open circuit indicated)
DTC - 69 A/C high pressure switch error
DTC - 70 A/C pressure sensor circuit error (high pressure indicated)
DTC - 71 A/C evaporator temp sensor circuit error (low temp indicated)
DTC - 72 VSS signal circuit error
DTC - 73 A/C evaporator temp sensor circuit error (high temp indicated)
DTC - 75 Digital EGR solenoid #1 circuit error
DTC - 76 Digital EGR solenoid #2 circuit error
DTC - 77 Digital EGR solenoid #3 circuit error
DTC - 79 Transmission fluid overtemp
DTC - 80 Transmission component slipping
DTC - 82 3x Crankshaft position sensor circuit error
DTC - 85 PROM error
DTC - 86 A/D error
DTC - 87 EEPROM error (flash memory error)
DTC - 90 TCC error
DTC - 93 Transmission pressure control solenoid circuit error
DTC - 96 Transmission system voltage low
DTC - 98 Invalid PCM program
DTC - 99 Invalid PCM program

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found code 84 for you go here

Reading Codes

*DTC 84 - Accelerator Pedal Position Circuit Fault

 

i see there are 2 codes for 55
DTC - 55 ECM error
DTC - 55 Digital EGR Valve solenoid 3 error
I just put a new ECM in it tonight. It started right up but now my Service engine soon light is staying on. I dont know if the new ECM has to take some time to read everything or what i m hoping it goes off. I have it out side running now i will give it a little bit and go out and read the codes off the new ECM to see what i get.
What is a Digital EGR Valve solenoid 3 error anyways. the ECM error i kinda get but the other i dont kno wanything about. what should i do to start to figure this out.

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now i m getting a DTC - 17 Camshaft position sensor error
and a DTC - 43 Knock sensor error
and a code 18 witch there isnt a 18.
this truck is getting on my nerves. I can win with this thing

 

Try clearing the codes this way may be accomplished by simultaneously depressing the brake and accelerator pedals fully while the PCM is in diagnostic mode (terminals A and B connected). It will not appear that you have cleared the codes until the next time you power up in diagnostic mode

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your truck maybe learning right now

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for get the first list gave you there not all there sorry

DTC 13 - Engine Shutoff Solenoid Circuit Fault
DTC 14 - Engine Coolant Temperature (ECT) Sensor Circuit Low (High Temp
Indicated)
DTC 15 - Engine Coolant Temperature (ECT) Sensor Circuit High (Low Temp
Indicated)
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 (Response Time Short)
DTC 36 - Injection Pulse Width Error (Response 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 Indicated)
DTC 43 - Fuel Temperature Circuit High (Low Temp Indicated)
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 Indicated)
DTC 48 - Intake Air Temperature Sensor Circuit High (Low Temp Indicated)
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 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 - 2-3 Shift Solenoid Circuit Fault
*DTC 82 - 1-2 Shift Solenoid Circuit Fault
*DTC 83 - TCC PWM Solenoid Circuit Fault
*DTC 84 - Accelerator Pedal Position Circuit Fault
*DTC 85 - Undefined Ratio Error
*DTC 86 - Low Ratio Error
*DTC 87 - High Ratio Error
DTC 88 - TDC (Top Dead Center) Offset Error
DTC 91 - #1 Cylinder Balance Fault
DTC 92 - #2 Cylinder Balance Fault
DTC 93 - #3 Cylinder Balance Fault
DTC 94 - #4 Cylinder Balance Fault
DTC 95 - #5 Cylinder Balance Fault
DTC 96 - #6 Cylinder Balance Fault
DTC 97 - #7 Cylinder Balance Fault
DTC 98 - #8 Cylinder Balance Fault
DTC 99 - Accelerator Pedal Position 2 (5 Volt Reference Fault)

 

I hope it learns fast i m getting
DTC 17 - High Resolution Circuit Fault
DTC 18 - Pump Cam Reference Pulse Error
DTC 35 - Injection Pulse Width Error (Response Time Short)
DTC 43 - Fuel Temperature Circuit High (Low Temp Indicated)
I dont know what any of this means but like crazy said it might be learning witch i hope thats what it is. I will try to reset the codes also.
Now i have never heard of this brake pedal and gas pedal thing before. I use my jumper from a to b then turn the key on and press both pedals all the way down. Is this correct.

 

yes Jasonduke5 sorry it took so long back to you but wife need puter for work

 

I dont know if i m doing this right but it didnt do anything. I use my jumper wire arcoss the a&b ports and then i turn the key on and hold both pedals to the floor. I tryed it twice and the codes are still in there. I have the batterys unhooked now to see if that will reset the codes. I dont know if that works for a diesel but thats what i use to do for my S-10.

 

Are you still getting codes ?

 

Yep the same ones. The odd thing is when i use a jumper wire i should get like 12 flashes or something like that to enter the test mode but it just starts spitting out codes. I tried the brake and gass peddal thing that didnt work and i unhooked my batterys for a while that didnt reset them. I did notice the truck is useing alot more fule and the motor is louder. The noise reminds me of like a cold start or like valve lash with a gas motor. I dont understand why the new computer is acting so much differnt then the last one. I m just about ready to get rid of the truck. The check engine light stays on all the time. I will be home in 15 to 20 minutes where i can **** with it more. Any ideals let me know what to do next.

 

i just think did they get you right computer for that truck it sound like bad one now did you change the computer or just the chip

When get home clear all the codes again and read off to us again