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1996 Mercury Mystique LS 2.5L MIL Lamp on
This one has us stumped. It keeps setting code PO 420 (cat efficiency, bank 1). Both bank 1 O2 sensors have been replaced and seem to switch normally (lab scope). Fuel pressure tests good (not high). There are a couple of things that have me concerned. Maybe y...
FIX posted 8/11/2001
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Message Closed w/FIX
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21 Replies Received
Related Documents & Media | VIN | 1MELM66L5T |
| Engine | 2.5 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
| P1519 | Idle Air Control Valve Circuit Malfunction |
Message Closed w/FIX
Vehicle Data
1996 Mercury Mystique LS
| VIN | 1MELM66L5T |
| Engine | 2.5 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
| P1519 | Idle Air Control Valve Circuit Malfunction |
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