986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Does the Durametric display "pending" codes?

Dale_K · 03-27-2011, 06:28 AM

Thanks. As it turns out, I am also fighting the 1126, 1128 and 1130 codes and have cleaned my MAF sensor twice with genuine MAF sensor cleaner. I want to suggest to you that maybe the sensor is good and you might have a vacuum leak. I found one on my oil fill tube and I was sure that was going to fix my car but the codes came back after 300 miles. I took my car to a shop that had a smoke machine to slightly pressurize the intake system with smoke and they found another leak on the vacuum line to the brake booster where it leaves the engine compartment behind the driver. I just ordered the replacement parts a few minutes ago.

My plan is to fix the vacuum leaks first and use the Durametric to monitor the long term fuel trim and MAF sensor readings. Also the "running lean" codes since I'll be able to see them even if the CEL isn't lit. I ordered a cap for the fuel rail pressure test point since the manual says you can't reuse the old cap and if the CEL comes on again after the current round of leaks are fixed I'll test the fuel pressure because that would cause the codes if the pressure is low.

Then if the CEL still comes on I'll buy a MAF sensor but at least I'll have some baseline readings from the Durametric to see if the new sensor has higher airflow readings than the old one.

Let me know how your repair turns out.

03-27-2011, 06:28 AM	#3
Dale_K Registered User Join Date: Dec 2010 Location: Hot Springs Village, Arkansas Posts: 245	Thanks. As it turns out, I am also fighting the 1126, 1128 and 1130 codes and have cleaned my MAF sensor twice with genuine MAF sensor cleaner. I want to suggest to you that maybe the sensor is good and you might have a vacuum leak. I found one on my oil fill tube and I was sure that was going to fix my car but the codes came back after 300 miles. I took my car to a shop that had a smoke machine to slightly pressurize the intake system with smoke and they found another leak on the vacuum line to the brake booster where it leaves the engine compartment behind the driver. I just ordered the replacement parts a few minutes ago. My plan is to fix the vacuum leaks first and use the Durametric to monitor the long term fuel trim and MAF sensor readings. Also the "running lean" codes since I'll be able to see them even if the CEL isn't lit. I ordered a cap for the fuel rail pressure test point since the manual says you can't reuse the old cap and if the CEL comes on again after the current round of leaks are fixed I'll test the fuel pressure because that would cause the codes if the pressure is low. Then if the CEL still comes on I'll buy a MAF sensor but at least I'll have some baseline readings from the Durametric to see if the new sensor has higher airflow readings than the old one. Let me know how your repair turns out.