1991 BMW M5 Repair Question
Topics covered: Sensor, Check engine light, Engine.
Mileage: No information provided.
Mileage: No information provided.
Asked on May 14, 2010
Check engine light at idle after long trips
Computer problem
1991 BMW M5 6 cyl Two Wheel Drive Manual 181000 miles
Hello. After I drive my car for a long trip (80+ miles), the check engine light will come on with a code of 1221 (oxygen sensor) when the car is at idle, such as at a stop light. Once I start moving again, the check engine light goes away. I have a new water temp sensor, oxygen sensor, MAF and vacuum hoses. Why is this happening only at idle after long trips? Does not happen in city driving.
1991 BMW M5 6 cyl Two Wheel Drive Manual 181000 miles
Hello. After I drive my car for a long trip (80+ miles), the check engine light will come on with a code of 1221 (oxygen sensor) when the car is at idle, such as at a stop light. Once I start moving again, the check engine light goes away. I have a new water temp sensor, oxygen sensor, MAF and vacuum hoses. Why is this happening only at idle after long trips? Does not happen in city driving.
Asked by piancuAnswer
Replied on May 15, 2010
Was the Oxygen sensor a Bosch direct replacement?
Replied on May 17, 2010
No, it was a Denso oxygen sensor. It has 10k miles on it.
Replied on May 18, 2010
There might be an issue with the Denso part. The system was built for a Bosch sensor.