What does O2 sensor heater circuit malfunction mean?
The trouble code P0135 is a generic powertrain code indicating a problem in the front oxygen sensor on Bank 1, a heated oxygen sensor circuit that decreases time to enter closed loop. …
What does heater circuit malfunction mean?
This code indicates that the Engine Control Module (ECM) has tested the oxygen sensor heater circuit and has found a problem with sensor 1 in bank 1. The ECM tests the oxygen sensor heater circuit at startup to check for one of three things – excessive current draw, opens, or shorts.
What does heater control circuit low mean?
Diagnostic Trouble Code (DTC) P0037 stands for “Heated Oxygen Sensor (HO2S) Heater Control Circuit Low (Bank 1, Sensor 2).” It refers to a malfunction in the heating element of the downstream oxygen sensor behind the catalytic converter.
How do you fix HO2S heater control circuit low?
If the battery feed is intact, remove the ground (control) circuit from the ECM wiring connector and check for resistance on the circuit. If there is infinite resistance, repair open in the circuit. If the control circuit checks out, suspect a bad O2 sensor. Replace the sensor and re-check.
How do you fix a heater control circuit?
To fix this, check for any blown fuses and disconnect the oxygen sensor connector. Using the voltmeter, with the engine off, check whether there’s a 12V fused battery feed to the heater element. If you see no voltage, then repair the short or open in the B+ feed circuit.
Where is the heater control sensor located?
The heater control valve allows the flow of coolant through the heater core to be controlled and switched on and off without affecting the operation of the rest of the cooling system. It may be located on the inlet or the outlet port of the heater core and activated by a cable, electronic control, or a vacuum signal.
What does a heater control circuit do?
What the P0052 code means. This code is seen when the Engine Control Module (ECM) tries to control the heater control circuit for Bank 2 Sensor 1 and finds high voltage present. The heater is an integral part of sensor function that is used to heat the oxygen sensor to operating temperature until the vehicle warms up.
Can heater control valve cause overheating?
Another symptom of a problem with the heater control valve or it’s hoses or connectors is a coolant leak. A coolant leak at the heater control valve is not only a problem in that it will disable the heater, but it will also compromise the cooling system which can cause the engine to overheat.
Why does my truck overheat when I turn on the heater?
Your engine’s cooling system builds up an enormous amount of pressure. The net result is a searing hot jet of air flowing from the heater vents, and engine overheating as a result of little to no coolant flowing through the radiator.