I am working on a Subaru Forester 2005 2liter petrol, non turbo. On oxygen sensor bank 1. block connecter is melted. Need to know which colours correspond with each wire?

Possible causes
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Most likely is your rear O2 sensor malfunction.

Subaru P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2
Change it and check engine light must go off

this is covered in the FSM book by jeep.
per engine. non stated, so.....?????

p0 are federal codes. (a standard)
and is oxygen sensor reads wrong.
B2 S1 is bad.
S1 is the front sensor.
bank 2 is the engine bank that has #1 cylinder.

the heater in side is blown out.
or the wires to it are bad..melted, cut, or connector to it rusty.
the ECU only knows, the heater fails to conduct current.
it sees the heater dead.
replace it or fix the wires to it.
same on all cars this. only bank varies.
next time post engine size. the line up.
some inline engines run 2 banks too, like calif cars do. not just V engines.

• 2.4 L PowerTech I4 (gasoline)
• 2.5 L VM Motori R 425 I4 (turbo diesel)
• 2.8 L VM Motori R 428 I4 (turbo diesel)
• 3.7 L PowerTech V6 (gasoline)

the left front cylinder is #1 on v6 Bank 1 IS LEFT

http://www.fixya.com/cars/t3949859-firing_order_diagram_02_jeep_liberty

seen here.
if this is your V6 engine, the 02 (b2) is on right , front (means upstream) bad.

does this help, the inline on calif engine, inline it is rear top sensor. B2S1, on split exhaust manifolds. for calif.

code p0054 is
Possible causes - Faulty Heated Oxygen Sensor Bank 1 Sensor 2
- Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection
When is the code detected?Heater current requirements too low or high in the heated oxygen sensor (HO2S) heater control circuit Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
code p0141 is O2sensor heater circuit malfunction( bank one sensor 2)
there is chance that wire from that sensor is touching,part of your exhaust system,and either is open or shorting to ground

code p0036
036 - HO2S Heater Control Circuit Bank 1 sensor 2check the wire from the sensor for the sign cut or melting,and change the sensor

Possible dirty fuel injector which is most common. It can also be bad oxygen sensors, vacuum leak, or worst case a leak at the intake manifold.

For 1999 Subaru Truck Forester AWD 2.5L MFI 4cyl the Oxygen Sensor is located under hood, center, rear engine area, mounted on catalytic converter.



Fig. Oxygen sensor location-Forester 1998-2002 2.5L SOHC engine (click over image for zoom).

Generally, Bank 1 is front and Bank 2 is rear.

Hope helps.

http://helpforcars.net/obd_codes/codes.php?code=P0037

It's an O2 sensor according to the above link, and it is bank 1 sensor 2 low, the 2 meaning that it is downstream past the catalytic converter but not on the manifold.

- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM) Possible Solution Tech Notes The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.
Good luck on this repair.

P0130----- 02 sensor circuit on bank #1 sensor #1
P0171------System too lean bank#1
The oxygen sensor on bank #1 needs a new one. If you have a V6 engine, the 02 sensor is screwed into the exhaust pipe up near the exhaust manifold on the same side #1 spark plug is, that's bank #1
I don't have my manual at the moment, so I can't tell you exactly where it is.
The sensor down by the catalytic converter is sensor #2 you don't want that one.

please my solutions i am All Data computer Erase.
key.

check your timing belt positioning also inspect the top end with cover of possibly try an oil flush