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Check engine lamp

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Old 02-22-2008, 11:53 AM
JimBlake's Avatar
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Location: Wisconsin
Posts: 17,406
Default RE: Check engine lamp

4-long & 1-short is code 41 - elecric heater built into the O2 sensor. In 1990 there's only one sensor.

Unplug the O2 (lambda) sensor & look for 2 same-color wires (black?) on the sensor. Resistance between those should be 10 to 40 ohms. If it's not, you need a new sensor.
 
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