Haltech E6A - Manual (Page 22)

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1.3.6. Mount Optional Exhaust Gas Oxygen Sensor
The optional exhaust gas oxygen sensor must be mounted in the exhaust pipe near the exhaust
header or extractors, usually after the collector. The sensor uses the exhaust gas to detect if the
engine is lean or rich. Many late model engines already have provision for an exhaust gas
oxygen sensor and the sensor provided should fit any standard exhaust mount. Some exhaust
systems have the sensor mount up to around half a meter (2 feet) down stream from the
exhaust headers.
If the exhaust system does not have an existing sensor mount then a new mount will have to be
welded to the exhaust system.
When routing the electrical connections to the exhaust gas oxygen sensor do not allow the
harness to touch the exhaust pipe as the heat will damage them.
See Chapter 15 [15.3] for more information on exhaust gas oxygen sensors.