bernardo1989

I have a 2005 honda accord hybrid and i just want to know what wires too check and how many ohms suppost to have in each o2 sensor can somebody plz help me

redbull-1

I believe your car has two air fuel ratio (A/F) sensors and two secondary oxygen sensors. Did you get a trouble code? If so, post the trouble code so it can be narrowed down to which of the four sensors.

bernardo1989

yeah the code is PO171

redbull-1

I can't find a test showing the wires or ohms. Here is the general troubleshooting procedures for Honda mechanics:

DTC P0171: Rear Bank (Bank 1) Fuel System Too Lean

NOTE: If some of the DTCs listed below are stored at the same time as DTC P0171, P0172, P0174, and/or P0175 troubleshoot those DTCs first, then recheck for P0171, P0172, P0174, and/or P0175.
P0107, P0108, P1128, P1129: Manifold absolute pressure (MAP) sensor
P0133, P0153, P1172*, P1173*, P2195, P2197, P2237, P2238, P2240, P2241, P2243,P2245, P2247, P2249, P2251, P2252, P2254, P2255, P2627, P2628, P2630, P2631, P2A00, P2A03: Air fuel ratio (A/F) sensor (Sensor 1) P0134, P0135, P0154, P0155: Air fuel ratio (A/F) sensor (Sensor 1) heater P0137, P0138, P0139, P0157, P0158, P0159, P2270*, P2271*, P2272*, P2273*: Secondary HO2S (Sensor 2)
P0141, P0161: Secondary HO2S (Sensor 2) heater
P2646, P2647, P2648, P2649: VTEC system
P0401, P0404, P0406, P2413: Exhaust Gas Recirculation (EGR) system
P2279: Intake air leakage
*: 2005 model only

1. Check the fuel pressure. Is the fuel pressure OK? YES - Check the valve clearances and adjust if necessary. If the valve clearances are OK, replace the injectors, then go to step 2. NO - Check these items:

o If the pressure is too high, replace the fuel pressure regulator, then go to step 2. If the pressure is too low, check the fuel pump, and the fuel feed pipe, then go to step 2.

2. Turn the ignition switch ON (II).
3. Reset the ECM/PCM with the HDS.
4. Do the ECM/PCM idle learn procedure.
5. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
6. Test-drive under these conditions:

o Engine coolant temperature more than 158 °F (70 °C)
o A/T in D position (M/T in 5th gear)
o Drive at a steady speed between 25 - 55 mph (40 - 88 km/h) for 5 minutes , then drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for 15 minutes .

NOTE: DTC P0171, P0172, P0174, and/or P0175 may take up to 40 minutes of test driving to set. Use the HDS to monitor the long term fuel trim (LT FUEL TRIM) or air fuel feed back AVG (AF FB AVG) for 15 minutes of driving. If the fuel trim/AFAVE stays within 10 % of 1.0 (0.0 %), there is no problem at this time.

7. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0171, P0172, P0174, or P0175 is indicated, go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.

I'll see what other info. I can find.

redbull-1

The first picture is the location of rear bank (bank 1). The second pictures are locations of all 4 sensors.

bernardo1989

allright man i been having problems trying to find information on all this and thank you a lot man

redbull-1

Clear the code, if it comes back, I would probably replace the oxygen sensor. That's all the info. I have. Good luck.

bernardo1989

ok ill try and i get back at you and thanks again for the help man

1grex

BTW there is no resistance (ohms) test for a O2 sensor. They generate their own voltage through chemical reaction. And they don't work right until they reach operating temp (in this case ECT at least 158) The only thing that can read a O2 sensor quickly enough is a scan tool.

rzmurph

you'd have better luck taking it to your local honda dealer for a pcm software update. refer to SB:06-039. the pcm incorrectly interprets data from the bank 1 air/fuel sensors. odds are you don't have a mechanical problem and the software update will be all that is necessary.

redbull-1

rzmurph is correct for the hybrid.