87 stock, 100k mi, getting code 45 while in garage after warming up and revving engine. Any easy suggestions? To achieve that code, that means the O2 sensor is functioning correct?
Any help would be great. Thanks Rob
Rob,
Here's what the website has listed as typical causes:
1) O2 sensor defective or contaminated (if incorrect RTV sealant or too much RTV is used, this may happen)
2) Leaking fuel injectors
3) Fuel pressure too high
4) EMI interference from poor plug wires
5) Evaporative Emission system defect
6) TPS and/or EGR problem
7) MAF sensor reading higher airflow than is actually present
But I would think that just revving it up, depending on how much revving you did, may get it to set that code, due to the extra fuel being sent when the rpms are up, but as you let your foot off the gas, you've got too much fuel. It may be easier to get that code/problem if your O2 sensor is old or contaminated. It will report slower, be kind of "lazy" and take more time to let the computer know if it's rich or lean so it can adjust the injector on-time, which would make it easier to become rich than if the sensor was new and changing almost as quickly as you hit the pedal. Atleast that's how I understand it. I would maybe get a new O2 sensor if the one in the car hasn't been changed in awhile. Hope that helps,
Scott