P1283 JEEP Air Fuel Ratio Sensor 1 Lean Shift Monitoring Bank 2

P1283 JEEP Air Fuel Ratio Sensor 1 Lean Shift Monitoring Bank 2

Possible causes
– Faulty Air fuel ratio (A/F) sensor 1 Bank 2
– Faulty Air fuel ratio (A/F) sensor 1 heater Bank 2
– Fuel pressure
– Faulty Fuel injector
– Intake air leaks
– Faulty Air Flow Meter
Tech description
If one or more sensors are replaced the Engine Control Module (ECM) Mixture Ratio Self-Learning clearing procedure must be perform.
What about the obd code?
The output voltage computed by ECM from the A/F sensor 1 (Bank 2) signal is shifted to the lean side for a specified period.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Possible rough engine idle
P1283 JEEP Description

The Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.

The sensor is capable of precise measurement

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