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Forum: Tech Help

10-17-2011, 02:41 PM

Replies: 3

1990 300SEL intermittent O2 code

Views: 1,579

Posted By patrick_mb

Just an update. Check engine light would still...

Just an update. Check engine light would still illuminate intermittently with the original ECU.

After e-mailing a couple junkyards that listed matching ECUs on car-part.com with no reply, I just...

Forum: Tech Help

06-13-2011, 09:37 AM

Replies: 3

1990 300SEL intermittent O2 code

Views: 1,579

Posted By patrick_mb

Thank you for the reply. The O2 sensor...

Thank you for the reply.

The O2 sensor heater sees about 13.5 volts when the engine is running. It draws about 2.5 amps when cold and quickly falls to just over 1 amp as the sensor heats up.

O2...

Forum: Tech Help

06-12-2011, 12:36 PM

Replies: 3

1990 300SEL intermittent O2 code

Views: 1,579

Posted By patrick_mb

1990 300SEL intermittent O2 code

Okay... 1990 300SEL, 49 state car. Same car from this thread:

http://www.peachparts.com/shopforum/showthread.php?t=300181

New Bosch O2 sensor. Repaired MAS.

This may be important: car O2...

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