heres the wiring diagram for the circuit.
HERE'S THE COMPLETE PIN POINT TEST FOR CODE P0155
Diagnostic Trouble Codes (DTCs) P0135 P0141, P0155 and P0161 indicate a short to ground, open, or short to VPWR in the HO2S heater circuit.
DTC/HO2S Reference List:
Note: On some applications, a vehicle hoist is required to access the HO2S harness.
Were any concerns found during the visual inspection?
No DTCs present. Fault may be intermittent. GO to Pinpoint Test Step Z1 with the following data: HO2S PIDs and a list of Possible causes.
Note: If DTCs P0135 and P0155 or P0141 and P0161 are displayed, both heater circuits will require testing. DTCs displayed separately are tested individually.
Is the voltage greater than 10.5 volts?
Is the resistance less than 4.0 ohms?
Is the resistance between 3 and 30 ohms?
Is the resistance greater than 10,000 ohms?
I hope this helps you out
just reply back later, this week and tell me how it goes.
THANK YOU MUCH IM SORRY I THOUGHT THAT I HAVE ALLREADY PRESS ACCEPT!! BUT NOW I HAVE ANOTHER QUESTION NOW IM GETTING CODE
P3158 BANK 2 INTAKE MANIFOLD RUNNER STOCK OPEN I GO TO THE BOOK THE BOOK DONT EVEN LIST THE CODE WHAT SHOUD I DO??