Hi All,

I just bought a 1998 E320 and I have been fixing issues all day.

New brake switch cured ASR - Skid Control error and cruise control now works

I have a check engine light and the display reads Engine Electronics. I replaced the A 1121400312 Air Intake Boot because it was completely broken thinking that it would cure the problem.
It did not so I went to Pep Boys and had them read the codes. I'm not sure if these are old codes or new codes or both. In fact I know nothing about code reading. Does anyone have any advice as to what to do/try next?

P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0170 Fuel Trim Malfunction (Bank 1)
P0173 Fuel Trim Malfunction (Bank 2)

Thanks for your help.

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1988 420 SEL
1991 420 SEL with 560 motor
1993 Miata