02 Heater Circuit

P0135 is the obd ii generic code indicating the engine control module ecm has tested the o2 sensor heater circuit and has detected a problem with the bank 1 sensor 1 o2 sensor heater circuit.

02 heater circuit. Sensor 2 would be the second sensor downstream from the engine. Modern oxygen sensors come with heating elements so that they heat up to the ideal operating temperature quickly. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop.

The o 2 sensor s heater circuit is controlled in one of two ways. O2 sensor heater circuit malfunction bank 1 sensor 1 what the p0135 code means. If the engine control module detects that the oxygen sensor heater circuit is open short or draws too much current based on coolant temperature the onboard computer will output obd ii diagnostic trouble code p0135. Remove the relay and retest the circuit.

Usually the heater circuit in this case is controlled by a relay. Water getting inside the heated oxygen sensor connector can cause the. The code means that there is a problem with the heater element circuit of the heated oxygen sensor. As the o2 heater reaches operating temperature the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it.

First is the positively controlled type of circuit. Diagnostic trouble code dtc p0161 stands for o2 sensor heater circuit malfunction bank 2 sensor 2 it warns about an issue with the bank 2 sensor 2 oxygen o2 sensor s heater circuit. Test the circuits of the oxygen sensor harness connector which is the connector on the engine wiring harness. Diagnostic trouble code dtc p0155 stands for o2 sensor heater circuit malfunction bank 2 sensor 1 it is triggered when the vehicle s computer or the engine control module ecm detects an unexpected voltage condition or excessive current draw on the heater circuit of your vehicle s bank 2 ho2.

Power comes from 10v to 12v from the oxygen sensor fuse in the compartment fuse box of the engine. This diagnostic trouble code dtc is a generic powertrain code which means that it applies to obd ii equipped vehicles. Oxygen o2 sensor heater circuit malfunction bank 1 sensor 1 what does that mean. Start by making sure the oxygen heater sensor gets power.

If the o 2 sensor heater circuit s negative wire goes directly to ground look for a short to power problem. The number 0135 points toward the heated oxygen sensor circuit specifically bank 1 sensor 1.