S40 check engine light on..

Car: Volvo, S40, 2002, 1.9L turbo - Back to Fix-It - Volvo Repair Manuals

Q.hi! 2002 volvo s40 check engine light on.
po036 code heather bank 2 sensor relay can you tell me where is the sensor relay located for this codo or haw to fix this code i instolled 2 02 sensor and still get the check engen light. can you help me fix this. mike.

I already checked/done: install 2 new 02 sensor and the code po036 came up heather bank 2 sensor relay can you tell me how to fix this problem.and where is this relay located.to see if is folty.

Answer Condition:
Diagnostic trouble code (DTC) ECM-18 or p0036 or ECM-1C is stored if the heated oxygen sensor (HO2S) pre-heating circuit is short-circuited to ground or voltage, if there is an open-circuit in the circuit or if the resistance in the element is incorrect.
Substitute Value
Fuel trim disabled.
Possible Source
Signal Too High:
Short-circuit to supply voltage in the signal cable
Faulty heated oxygen sensor (HO2S).
Signal Too Low:
Short-circuit to ground in the signal cable
Faulty heated oxygen sensor (HO2S).
Signal Missing:
Open-circuit in the signal cable
Faulty heated oxygen sensor (HO2S)
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S40 check engine light on..