TPMS and OAT incorrect readings
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,683
Likes: 23
From: Newark CA
TPMS and OAT incorrect readings
My 2001 is having a new electrical problem. New tire-pressure sensors were installed a year ago. The battery died recently, probably due to a problem with the under-hood lamp. I removed the battery and had it checked-told it was good. I had a SMOG check done (California), and it failed. Was told I need to put 100 miles on the car so that the ECM has enough data for the test equipment. On the ride home I noticed that the OAT (outside-air temperature) reading was about 10 degrees high and the left-front tire-pressure reading went from 5 psi to 12 psi high. I disconnected the battery again, recalibrated the pressure sensors and drove the car about 60 miles. Also disconnected the under-hood lamp. Still have the problems. Any ideas what could be causing these problems?
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,667
My 2001 is having a new electrical problem. New tire-pressure sensors were installed a year ago. The battery died recently, probably due to a problem with the under-hood lamp. I removed the battery and had it checked-told it was good. I had a SMOG check done (California), and it failed. Was told I need to put 100 miles on the car so that the ECM has enough data for the test equipment. On the ride home I noticed that the OAT (outside-air temperature) reading was about 10 degrees high and the left-front tire-pressure reading went from 5 psi to 12 psi high. I disconnected the battery again, recalibrated the pressure sensors and drove the car about 60 miles. Also disconnected the under-hood lamp. Still have the problems. Any ideas what could be causing these problems?
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,683
Likes: 23
From: Newark CA
Both problems fixed
Both problems turned out to be caused by faulty sensors. $100 for the TPMS sensor and installation and $10 for the OAT sensor.
The TPMS sensors aren't recalibrated. They are relearned. My wrong choice of words.
The TPMS sensors aren't recalibrated. They are relearned. My wrong choice of words.
