How hard is it to fix this problem of code p1166

code p1166 refers to heated oxygen sensor(HO2S)-front heater circuit===causes --wiring-- HO2S sensor--ECM

PO 102 MASS AIR FLOW SENSOR CIRCUIT LOW INPUT, I NEED MAKE MODEL AND ENGINE SIZE AND I CAN BETTER HELP YOU BEEN ON KIAS SINCE 98 MASTER CERT.

Hello there:
P1167 and P1166 codes relate to the primary O2 sensor heater malfunction.
there are two different O2 sensors, a "universal" sensor from Autozone and a supposedly OEM sensor from O'Reilly's. Both of them may cause the car to throw a p1166 or P1167 code and run rough. so i highly recommend getting a O2 sensor from Honda, and this will fix the problem .
It turns out that none of the aftermarket probes from Bosch or Denso will work on a ULEV (F23A4) 4 cyl. engine. Honda had different part number probes for the normal VTEC 4 cyl. and the ULEV Vtec engine and the probes look different and have different length cables. The computers at O'Reilly's, Autozone, or NAPA made no distinction between these two engine types.

P1166. Primary HO2S (No. 1) Heater System Electrical.

Replace O2 sensor. Iif it smells rich then you are getting too much fuel. You may have a problem with the fuel pressure regulator or a leaking fuel injector. This can also be caused by bad oxygen sensors.

Hops helps (remember to rate this answer).

P1166 refer to O2 sensor heater circuits malfunction, HO2 Heater system electrical, bank 1.

You can try resetting the system (clear the codes) by removing, with the key off, the number 13 fuse (7.5 amp)(CLOCK/BACKUP) from the fuse/relay box (end of the instrument panel, passenger's side) for 10 seconds. If the code comes back, you still have a problem.
Hope this helps you.

P1166 O2 Sensor - controller adaption diagnosis malfunction (bank 1).

Trouble area:

* P1166 is case for HO2S (Bank 1, Sensor 1) Signal line open
* Fuel system (Fuel tank/Pressure regulator/Fuel pump/PSV) failure
* Poor connection to fuel line hose/sealing/cut
* Sealing between purge valve and fuel tank
* Air leakage in exhaust system
* Ignition system (ignition coil, spark plug, cable) failure
* Surge tank and intake port failure

P1259 is a code for vtec malfunction usually cause by a bad vtec solenoid, vtec pressure sensor, low oil level, bad connection. Was oil change done? May want to check the oil level. P1166 is a code for a primary o2 sensor 1.

p1166 and p1167 are Air/Fuel ratio code sensor codes (O2 sensor codes) heater circuit problem

The fuel pump is vapor locking, common problem in high temp/altitude states. Call the dealer and see if campaign t-13 applies to your car, if the car was originally sold in a low altitude state, it won't apply. I recommend the fuel pump be replaced with updated fuel pump sub assy.