P0135 chevy impala 2003

SOURCE: 2002 chevy impala p0420 code.

here is a site that may help you with your po420 code http://www.aa1car.com/library/p0420_dtc.htm

SOURCE: what do the trouble codes mean? p0305 and p0135

P0305 IS # 5 CYLINDER MISFIRE DETECTED.P0135 IS BANK 1 SENSOR 1 OXYGEN HEATER CIRCUIT FAILURE

SOURCE: serpentine belt diagram for 2003 chevy impala

send an email to [email protected] and I will send the diagram to you

SOURCE: How many 02 sensors does a 2003 chevy venture have

Hello dillonca: My name is Roger and I will help you. There should be two sensors. One in the exhaust manifold back by the firewall. This is sensor 1 bank one. The other is behind the catalytic converter. This is bank one sensor 2.
Should you need further help please just ask. Please rare your answer. This way I know the answer was helpful. Tank You for using Fix Ya. Roger

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SOURCE: Fault codes

P0449 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
P0481 - Cooling Fan Relay 2 Control Circuit
It is not uncommon for the canister vent solenoid to go out.More then likely this is the correction for this issue.The second problem could be addressed by verifying that the second fan is not coming on and whether or not the fan is receiving any power.Turning the a/c on normally forces the second fan to come on.If it does not a wiring diagram may be necessary to check different points for power.Would start at the relay itself to verify power is going to and through the relay. You can also swap an identical relay with the fan relay just to test if the relay itself is malfunctioning.If it works after that then you need a replacement relay for that circuit.If it still does not work you will need to find out where the power stops flowing in that circuit.