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1994 BMW 740i 4.0L O2 switching slow
The car came in with MIL on. Got codes noted. Found a vacuum leak on the main air inlet hose after the MAF. Then rechecked the O2s and trims. Bank 2 O2 was not switching as fast as bank 1, so I replaced bank 2 sensor. Now at idle both O2s look good until you r...
Summary posted 5/2/2011
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Related Documents & Media | VIN | WBAAM3349Y |
| Engine | 4.0 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | US |
| Symptoms | O2 Switching Slow |
| Occurs | Above Idle |
Trouble Codes
| 12 | Oxygen sensor 2 |
| 203 | Oxygen sensor control 2 |
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Vehicle Data
1994 BMW 740i
| VIN | WBAAM3349Y |
| Engine | 4.0 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | US |
| Symptoms | O2 Switching Slow |
| Occurs | Above Idle |
Trouble Codes
| 12 | Oxygen sensor 2 |
| 203 | Oxygen sensor control 2 |
Video