I’ve got a 2005 dodge ram 1500 5.7
problem is the bank 1 sensor 1 is giving a p0135

I’ve replaced all sensors with proper ones even swapped around and even bout others and still no change

original error was for high voltage I ended up finding a bad wire on the heater circuit and after replacing it is when I got the p0135 or heater circuit malfunction

the only thing I think could still be causing problems is the signal wires for the o2 sensor because I’ve tested the voltage to the heater circuit and it’s good so what I’d like to know is where do the signal wires run to so instead of chasing wires … “i can’t there above the transmission” could I just get a diagram find out where they go and just re run them with new wires ofc after doing a continuity test to see if that’s really the problem

Bad wire that was fixed this was as far as I could reach above the transmission

 

Try here for wiring diagrams.

 

Ok so I have this for the o2 but it don’t really tell me where the wires go unless I’m missing something.?
I’d like a pin out of the ecm of what wires are the o2 or something to better help pinpoint where the o2 wires go so I can just run my own wires and not worry about the old one since there above the transmission where I can’t reach to even follow them or begin looking for a short or broken connection. Only way I’d be able to do that would be dropping the transmission and I can’t do that working out a driveway with limited tools and use the truck to daily to work so can’t be down to long … please help

 

If you follow the wires from the O2 sensors back, they should lead back to the PCM, and will tell you which connector/cavity they go to. The heater circuits probably come from a relay or some such in the TIPM.

 

ok yeah that’s the problem I can’t I’ve tried the wire harness runs up above the transmission along the back side of the engine literally no way to get back there without dropping the transmission.. the one wire I did fix was as far as I could get and I had to sit in the wheel well and twist my arms around the exhaust and frame just to fix that one ….
only thing I could think to do is unplug everything on the back side of the engine and just pull all the wires up from behind the engine and trace it from there but there’s so many wires going in so many directions I feel I’d break something trying to pull it all … that’s why I figured if I found where they went I could just replace the wires from there and just ignore the harness all together

 

I’m gonna try this in the morning found on another site


2003 Ram 4.7L/5.7L pinout at engine control module. Four main headings= four 38 pin connectors in order Black, Grey, White, Green. Ink print of color on controler side of the plug & it's also on the connectors themselves, visable when you unplug each from the module. Pin #'s are labeled on each connector at the start and end of each row of wires.

POWERTRAIN CONTROL MODULE C1 (NGC) - BLACK 38 WAY
CAV CIRCUIT FUNCTION
1 K98 18LB/RD COIL CONTROL NO. 8
2 - -
3 K97 18BR COIL CONTROL NO. 7
4 K28 18GY/LB INJECTOR CONTROL NO. 8
5 K26 18VT/TN INJECTOR CONTROL NO. 7
6 - -
7 - -
8 B222 20DG/WT (5.7L) VEHICLE SPEED SIGNAL NO. 2
9 Z81 16BK/TN GROUND
10 - -
11 Y135 18LG/BK FUSED IGNITION SWITCH OUTPUT
12 A51 16RD/WT (4.7L) FUSED IGNITION SWITCH OUTPUT (OFF-RUN-START)
12 Y135 LG/BK (5.7L) FUSED IGNITION SWITCH OUTPUT
13 G7 18WT/OR (4.7L) VEHICLE SPEED SIGNAL
13 B22 20DG/YL (5.7L) VEHICLE SPEED SIGNAL NO. 1
14 - -
15 - -
16 - -
17 - -
18 Z82 16BK/TN GROUND
19 - -
20 G60 18GY/YL OIL PRESSURE SIGNAL
21 C18 18DB A/C PRESSURE SIGNAL
22 G31 18VT/LG AAT SIGNAL
23 - -
24 - -
25 D20 18LG (4.7L) SCI RECEIVE
25 D20 20LG (5.7L) SCI RECEIVE
26 D6 18PK/LB SCI RECEIVE (TCM)
27 K6 18VT/WT 5-VOLT SUPPLY
28 - -
29 A14 20RD/WT FUSED B+
30 A41 16YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
31 K141 18TN/WT O2 1/2 SIGNAL
32 Y213 18PK/LB O2 RETURN UPSTREAM
33 K341 18TN/WT (4.7L) O2 2/2 SIGNAL
34 - -
35 - -
36 D21 18PK (4.7L) SCI TRANSMIT
36 D21 20PK (5.7L) SCI TRANSMIT
37 D15 18WT/DG (4.7L) SCI TRANSMIT (TCM)
38 D25 20VT/BR PCI BUS

POWERTRAIN CONTROL MODULE C2 (NGC) - GRAY 38 WAY
CAV CIRCUIT FUNCTION
1 K96 18TN/LB COIL CONTROL NO. 6
2 K95 18TN/DG COIL CONTROL NO. 5
3 K94 18TN/LG COIL CONTROL NO. 4
4 K58 18BR/DB FUEL INJECTOR NO. 6 DRIVER
5 K38 18GY FUEL INJECTOR NO. 5 DRIVER
6 F888 18BR/PK (5.7L) ETC MOTOR (+) CONTROL
7 K93 18TN/OR COIL CONTROL NO. 3
8 - -
9 K92 18TN/PK COIL CONTROL NO. 3
10 K91 18TN/RD COIL CONTROL NO. 1
11 K14 18LB/BR FUEL INJECTOR NO. 4 DRIVER
12 K13 18YL/WT FUEL INJECTOR NO. 3 DRIVER
13 K12 18TN FUEL INJECTOR NO. 2 DRIVER
14 K11 18WT/DB FUEL INJECTOR NO. 1 DRIVER
15 K101 18WT (5.7L) TP SENSOR RETURN
16 - -
17 K299 18BR/WT (4.7L) O2 2/1 HEATER CONTROL
18 K41 18DK/DG O2 1/1 HEATER CONTROL
19 K20 18DG GENERATOR FIELD DRIVER
20 K2 18TN/BK ECT SIGNAL
21 K22 18OR/DB TP NO. 1 SIGNAL
22 - -
23 K1 18DG/RD MAP SIGNAL
24 Y205 18BR/WT (5.7L) KNOCK SENSOR NO. 1 RETURN
25 K73 18YL/BK (5.7L) KNOCK SENSOR NO. 1 SIGNAL
26 K77 18BR/WT TRANSFER CASE POSITION SENSOR INPUT
27 K4 18BK/LB SENSOR GROUND 1
28 K60 18YL/BK (4.7L) IAC SIGNAL
28 K122 18DB/GY (5.7L) TP NO. 2 SIGNAL
29 K7 18OR 5 VOLT SUPPLY
30 K21 18BK/RD IAT SIGNAL
31 K99 18BR/OR O2 1/1 SIGNAL
32 K902 18BR/DG O2 RETURN DOWNSTREAM
33 K241 18LG/RD (4.7L) O2 2/1 SIGNAL
34 K44 18TN/YL CMP SIGNAL
35 K24 18GY/BK CKP SIGNAL
36 K74 18BR/VT (5.7L) KNOCK SENSOR NO. 2 SIGNAL
37 Y206 18DB/VT (5.7L) KNOCK SENSOR NO. 2 RETURN
38 K39 18GY/RD IAC CONTROL
38 F855 18OR/PK (5.7L) ETC MOTOR (-) CONTROL

POWERTRAIN CONTROL MODULE C3 (NGC) - WHITE 38 WAY
CAV CIRCUIT FUNCTION
1 - -
2 - -
3 K51 20DB.YL ASD RELAY CONTROL
4 - -
5 V35 18LG/RD (4.7L) S/C VENT CONTROL
6 Y145 20DB/YL CONDENSER FAN RELAY CONTROL
7 V32 20YL/RD (4.7L) S/C POWER SUPPLY
8 K106 18WT/DG NVLD SOLENOID CONTROL
9 K199 18BR/VT O2 1/2 HEATER CONTROL
10 K399 18BR/GY (4.7L) O2 2/2 HEATER CONTROL
11 C13 20DB/OR A/C CLUTCH RELAY CONTROL
12 V36 18TN/RD (4.7L) S/C VACUUM CONTROL
13 - -
14 V32 20YL/RD (5.7L) BRAKE SWITCH NO. 2 SIGNAL
15 Y215 20YL/PK (5.7L) S/C SWITCH RETURN
16 K223 18PK/DB (5.7L) APPS NO. 1 RETURN
17 K981 18BR/DG (5.7L) APPS NO. 2 RETURN
18 V38 20VT/OR (5.7L) S/C SWITCH NO. 2 SIGNAL
19 A142 16DG/OR ASD RELAY OUTPUT
20 K108 18WT/TN EVAP PURGE SOL SIGNAL
21 T24 20BR/YL TRS T24 SENSE (P/N SENSE)
22 G113 18OR PTO SWITCH SENSE
23 K29 18WT/PK (4.7L) BRAKE SWITCH SIGNAL
23 K29 20WT/PK (5.7L) BRAKE SWITCH SIGNAL
24 - -
25 K255 18WT/DG (5.7L) APPS NO. 1 SIGNAL
26 - -
27 - -
28 A142 16DG/OR ASD RELAY OUTPUT
29 K52 18PK/BK EVAP PURGE SOL CONTROL
30 S28 18YL/BK P/S SWITCH SIGNAL
31 - -
32 K118 18PK/YL BATT TEMP SIGNAL
33 G8 18LB/BK (4.7L) FUEL LEVEL SIGNAL
33 G8 20LB/BK (5.7L) FUEL LEVEL SIGNAL
34 V37 18RD/LG (4.7L) S/C SWITCH NO. 1 SIGNAL
34 V37 20RD/LG (5.7L) S/C SWITCH NO. 1 SIGNAL
35 K107 18OR NVLD SWITCH SENSE
36 K81 18DB/DG (5.7L) APPS NO. 2 SIGNAL
37 K31 18BR FUEL PUMP RELAY CONTROL
38 T752 18DG/OR STARTER RELAY CONTROL

POWERTRAIN CONTROL MODULE C4 (NGC) - GREEN 38 WAY
CAV CIRCUIT FUNCTION
1 T60 18BR (4.7L) OVERDRIVE SOLENOID CONTROL
2 T159 18DG/WT (4.7L) 4C SOLENOID CONTROL
3 Y207 18RD/WT (5.7L) TPS NO. 1 OUTPUT
4 T140 18VT/LG (4.7L) PRESSURE CONTROL SOLENOID CONTROL
5 Y208 18DB/YL (5.7L) APPS NO. 1 OUTPUT
6 T119 18WT/DB (4.7L) 2C SOLENOID CONTROL
7 T10 18YL/DG (5.7L) TORQUE MANAGEMENT REQUEST SENSE
8 T59 18PK (4.7L) UNDERDRIVE SOLENOID CONTROL
9 Y209 18TN/BK (5.7L) SENSOR GROUND
10 T120 18LG (4.7L) LR SOLENOID CONTROL
11 T118 18YL/DB (4.7L) PRESSURE CONTROL SOLENOID CONTROL
11 Y210 18YL/RD (5.7L EATX) RPM SIGNAL
12 Z13 16BK/RD (4.7L) GROUND
13 Z13 16BK/RD (4.7L) GROUND
14 Z13 16BK/RD (4.7L) GROUND
15 T1 18LG/BK (4.7L) TRS T1 SENSE
16 T3 18VT (4.7L) TRS T3 SENSE
17 T6 18OR/WT (4.7L) OVERDRIVE OFF SWITCH SENSE
18 K30 18PK (4.7L) TRANSMISSION CONTROL RELAY CONTROL
19 T16 16RD (4.7L) TRANSMISSION CONTROL RELAY OUTPUT
20 T48 18DB (4.7L) 4C PRESSURE SWITCH SENSE
21 T29 18GY (4.7L) UNDERDRIVE PRESSURE SWITCH SENSE
22 T9 18OR/BK (4.7L) OVERDRIVE PRESSURE SWITCH SENSE
23 - -
24 - -
25 - -
26 T4 18PK/OR (4.7L) TRS T2 SENSE
27 - -
28 T16 16RD (4.7L) TRANSMISSION CONTROL RELAY OUTPUT
29 T50 18DG (4.7L) LOW/REVERSE PRESSURE SWITCH SENSE
30 T147 18LB (4.7L) 2C PRESSURE SWITCH SENSE
31 T38 18VT/TN (4.7L) LINE PRESSURE SENSOR SIGNAL
32 T14 18LG/WT (4.7L) OUTPUT SPEED SENSOR SIGNAL
33 T52 18RD/BK (4.7L) INPUT SPEED SENSOR SIGNAL
34 T13 18DB/BK (4.7L) SPEED SENSOR GROUND
35 T54 18VT (4.7L) TRANSMISSION TEMPERATURE SENSOR SIGNAL
36 - -
37 T42 18VT/WT (4.7L) TRS T42 SENSE
38 T16 16RD (4.7L) TRANSMISSION CONTROL RELAY OUTPUT

 

Use the wiring diagram. Follow the wires.