Volvo: 2000 v70 codes, vacuum leaks, o2 sensors

Question
i have a check engine light and two codes: P1113 and
P0135.  can you offer any direction to the repair?

Answer
William,
PO 135 is front heater oxygen sensor. P1113 is the outer temp sensor. Look out in front of the spoiler and see if there is a temp sensor that is damaged or disconnected. Repair that or replace clear the code.
P1113,
Check for vacuum leaks, monitor the o2 sensor if it is not working replace it and clear the code. If it is slow operating replace it clear the code.
If you do not have the proper scanner to read the codes and monitor the system take it to someone that has the tools. You might need both o2 sensors to fix the fault. Somtimes if one o2 gos out and it is replaced the other will not react quick enough and set a new code.