Honda 6-Pin O2 Oxygen Sensor Connector – OEM 6189-0133 / 6188-0175 | Accord Fit Civic CR-V
Direct OEM-specification replacement for the Honda 6-pin heated oxygen sensor (HO2S) connector. Cross-references OEM part numbers 6189-0133 (female/socket side) and 6188-0175 (male/plug side). Used on upstream (pre-cat, Bank 1 Sensor 1) and downstream (post-cat, Bank 1 Sensor 2) oxygen sensors across Honda petrol engine platforms. Available bare or with 15cm pre-wired leads.
Honda’s 6-pin O2 sensor connector integrates the standard 4-pin HO2S circuit (heater power, heater ground, signal, signal ground) with two additional pins for the wideband lambda sensor or secondary sensor circuit used on Honda’s VTEC and i-VTEC engines. This allows the ECU to receive both the narrowband switching signal and the wideband air-fuel ratio signal from a single connector, improving fuel trim accuracy across the full RPM range. A corroded 6-pin connector causes the ECU to lose one or both sensor signals simultaneously, triggering multiple O2 fault codes and forcing the ECU into open-loop fuelling.
| OEM Number | Type |
|---|---|
| 6189-0133 | Female (socket side) — harness side |
| 6188-0175 | Male (plug side) — sensor side |
| Pin | Function | Failure Symptom if Corroded |
|---|---|---|
| 1 | Heater element power (+12V switched) | P0135 / P0141 — O2 sensor heater circuit malfunction |
| 2 | Heater element ground | Slow O2 warm-up, rich running when cold |
| 3 | O2 signal output to ECU (0–1V narrowband) | P0130 / P0136 — O2 sensor circuit fault, poor fuel economy |
| 4 | Signal ground / reference | Erratic O2 reading, ECU unable to trim fuel |
| 5 | Wideband / secondary sensor signal (+) | P0153 / P0157 — secondary O2 circuit fault |
| 6 | Wideband / secondary sensor signal (−) | ECU forced into open-loop, fuel trim at limit |
| Attribute | Detail |
|---|---|
| Pin Count | 6-Pin |
| OEM Part Numbers | 6189-0133 / 6188-0175 |
| Housing Material | High-temp nylon (PA66), waterproof sealed |
| Wire Option | Bare connector / 15cm pre-wired leads |
| Application | Heated oxygen sensor (HO2S) harness — upstream and downstream |
| Compatible Brands | Honda, Acura |
| Code | Description |
|---|---|
| P0130 | O2 sensor circuit — Bank 1, Sensor 1 |
| P0136 | O2 sensor circuit — Bank 1, Sensor 2 |
| P0135 | O2 sensor heater circuit — Bank 1, Sensor 1 |
| P0141 | O2 sensor heater circuit — Bank 1, Sensor 2 |
| P0153 | O2 sensor circuit slow response — Bank 2, Sensor 1 |
Q: My Honda has both P0135 and P0130 simultaneously — is it the connector?
A: Simultaneous heater circuit fault (P0135) and signal circuit fault (P0130) from the same sensor location almost always indicates a corroded 6-pin connector rather than two separate sensor failures. The heater and signal circuits share the same connector, so corrosion affects both simultaneously. Inspect the connector before replacing the O2 sensor.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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6 Pin Connectors
