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1998 Toyota Sienna LE 3.0L Poor Fuel Economy, MIL Lamp on
Thanx in advance for the help. This one has me lost. Code p0420 low cat efficiency bank 1. Bank 1 sensor switching but slow. Replaced o2 sensor with aftermarket NGK sensor. Sensor readings better. Retuned to customer. One month later code is back. Graph O2 sen...
FIX posted 12/18/2007
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Message Closed w/FIX
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15 Replies Received
15 Replies Received
Related Documents & Media | VIN | 4T3EZF13C9 |
| Engine | 3.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
1998 Toyota Sienna LE
| VIN | 4T3EZF13C9 |
| Engine | 3.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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