Greetings..I have recently noticed an oil leak under my CRV. Valve cover gasket replaced not to long ago. Put up on the lift, and am looking at a couple of sensors by the oil filter. It appears that the one to the left is the single wire oil pressure switch, which apparently is a common leake area. However, there is also a two wire, offset blade switch that is above the oil filter. I cannot figure out what this sensor does, or if it would leak oil. I am debating replacing both of these sensors if need be. Any help on what the sensor/switch above the oil filter would be? 2.0 motor. Thanks..Also plan on replacing the oil pan gasket.

 

The other sensor is the knock sensor, it will not leak oil.

 

I was thinking maybe knock sensor, but this is a two wire blade sensor, and the two blades face different directions, like a T. The knock sensors I looked up had a different type of connections. Thanks

 

What are the wire colors?

 

I am going to go out on a limb and assume you do not live in the USA. The blocks on US spec CRVs only came with the Oil Pressure Switch (idiot light) and in later models a Knock Sensor. The knock sensor does come in single and two wire setups. A picture of the suspected problem sensor would be of great help in this situation.

 

I will check the wire colors tomorrow.

 

Warrensburg, MO...My picture/computer skills and equipment are limited. I will do some more research. Thanks On another note, next to this unknown sensor are two open plugs/pigtails on a bracket. Any ideas on what they might be for? Nothing plugged into them.

 

Those are connectors C134 and C136. They are like junction connectors; terminals grouped together that are connected by the same electrical bus bar.

C134 has:
- Blk/Yel power wire from under-dash Fuse 15 to feed various Blk/Yel wires to the following: primary heated O2 sensor, EVAP canister purge valve, PCM (models w/ AT), alternator, and VSS.
- Grn/Blk sensor ground wire from PCM or ECM to feed various Grn/Blk wires to the following: fuel tank pressure sensor, TPS, IAT sensor, and primary heated O2 sensor.

C136 has:
- Power wire from under-hood Fuse 44, which comes through the Main Relay, where a Yel/Blk wire feeds various Yel/Blk wires to the following: IAC valve, and individual fuel injectors.
- Ground wire from Ground G101 to feed various blk wires to the following: main relay, transmission range switch (AT), power steering pressure switch, radiator fan switch, VSS, and PCM or ECM.

 

Thanks for all your help. You guys were spot on. It is the knock sensor. Although the electrical connector has two slots, the actual sensor only has one blade connector. I should have looked into it deeper before I posted. Thanks again.