There is no such code. There's a sensor 2 which is always AFTER the catalytic converter. But there's no such thing as sensor 3. And no, an oxygen sensor could never cause low heat. You have low coolant or a bad blend door actuator.
O2 sensors have heaters to get them up to operating temperature quickly, but these sensors monitor oxygen levels in the exhaust system. They have nothing to do with how the cabin heater works in your car.
The symptoms you give, cool air at idle, but (normal) warm air when the engine is at higher rpm, is consistent with low coolant levels or an air lock in the cooling system (not all the air has been bled out). Check your coolant level, service the system if low, and then bleed all the air out of the cooling system.
SOURCE: Heater blows cold air unless accelerating
1.maybe your thermostat is no opening or closing.
2. not enough Ant-Freeze
3. Low on water
With more details on the engine i may be able to help you more. for example what is the temp reading after it idles awhile or does it blow warmewr when driving ?
SOURCE: more 99 cougar problems
there is a fuse for the o2 heaters if one of the sensors blew the fuse they will all be out
SOURCE: I asked the question...
P0038=HO2S Heater Control Circuit High Bank 1 Sensor 2,
The oxygen sensors on your truck have an extra wire to them,they are a heated oxygen sensor,
the computer sees a problem with the heated oxygen sensor on the drivers side,before converter.
not the sensor after converter!
SOURCE: P0032 is the code. Where is the sensor? HO2S
this is the circuit for the heater element in your o2 sensor it is in your exhaust pipe it will be pre catalytic converter.
P0050 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 1)
P0051 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 1)
P0052 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 1)
P0053 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 1)
P0054 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 2)
P0055 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 3)
P0056 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 2)
P0057 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 2)
P0058 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 2)
P0059 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 1)
P0060 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 2)
P0061 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 3)
P0062 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 3)
P0063 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 3)
P0064 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 3)
P0065 Air Assisted Injector -Range/Performance
P0066 Air Assisted Injector -Circuit Malfunction or Circuit Low
P0067 Air Assisted Injector -Circuit High
P0068 (MAP) Manifold Absolute Pressure /(MAF) Mass Air Flow - Throttle Position
Correlation
P0069 (MAP) Manifold Absolute Pressure / (BARO)Barometric Pressure Correlation
P0070 Ambient/Outside Air Temperature Sensor -Circuit Malfunction
P0071 Ambient/Outside Air Temperature Sensor -Range/Performance Problem
P0072 Ambient/Outside Air Temperature Sensor -Circuit Low Input
P0073 Ambient/Outside Air Temperature Sensor -Circuit High Input
P0074 Ambient/Outside Air Temperature Sensor -Circuit Intermittent
P0075 Intake Valve Control Solenoid Circuit Malfunction (Bank 1)
P0076 Intake Valve Control Solenoid Circuit Low (Bank 1)
P0077 Intake Valve Control Solenoid Circuit High (Bank 1)
P0078 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 1)
P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)
P0080 Exhaust Valve Control Solenoid Circuit High (Bank 1)
P0081 Intake valve Control Solenoid Circuit Malfunction (Bank 2)
P0082 Intake Valve Control Solenoid Circuit Low (Bank 2)
P0083 Intake Valve Control Solenoid Circuit High (Bank 2)
P0084 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 2)
P1100 Manifold Absolute Pressure Sensor Range/Performance
P1102 Manifold Absolute Pressure Sensor Circuit Low Input
P1103 Manifold Absolute Pressure Sensor Circuit High Input
P1123 Lang Term Fuel Trim Adaptive Too Lean
P1124 Long Term Fuel Trim Adaptive Too Rich
P1127 Long Term Fuel Trim Multiplier Too Rich
P1128 Long Term Fuel Trim Multiplier Too Lean
P1134 HO2S Bank 1 Sensor 1 Transition Time Switch (Bank 1 Sensor I)
P1154 HO2S Bank 2 Sensor 1 Transition Time Switch (Bank 2 Sensor 1)
P1166 HO2S Bank 1 Sensor 1 Controller Adaptive Diagnosis Fault (Bank 1)
P1167 HO2S Bank 1 Sensor 1 Controller Adaptive Diagnosis Fault (Bank 2)
P1168 HO2S Bank 1 Sensor 1 Heater Power Incorrect (Bank 1 Sensor 2)
P1169 HO2S Bank 1 Sensor 1 Heater Power incorrect (Bank 2 Sensor 2)
P1372 Segment Time Incorrect
P1400 Manifold Differential Pressure Sensor Circuit
P1440 EVAP System Vent Solenoid Circuit
P1443 EVAP System Fault (Fuel Tank Cap Missing)
P1510 Idle Control Valve Opening Circuit Shorted (Coil 1)
P1511 Idle Control Valve Command Signal Shorted (Coil 2)
P1513 Idle Air Control Valve Opening Coil Circuit Open (Coil 1)
P1521 Power Steering Switch Input Circuit
P1529 Customer Snapshot Request VIA CAN
P1552 Idle Air Control Valve Closing Coil Circuit Shorted
P1553 Idle Air Control Valve Closing Coil Circuit Open
P1586 Encoding Signal Circuit Not Rationale
P1602 Serial Communication Fault with Transmission Control Unit
P1605 Rough Road Sensor Circuit
P1606 Rough Road Sensor Circuit Not Valid
P1611 MIL Request Signal Circuit Low Input
P1613 ECU Self-Test Failed
P1614 MIL Request Signal Circuit High Input
P1616 Main Relay Fault
P1623 Diagnostic Lamp Power Stage Fault
P1624 MIL On Request Signal//Cooling Fan Relay Low Circuit
P1625 Cooling Fan Relay High Circuit
P1665 Power Stage Group 'A' Fault
P1670 Power Stage Group 'B' Fault
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