- Feb 22, 2004
- 6
- 0
- 1
Can anyone tell me what a KOER Code of 41 means?
I've got some kind of engine problem and ran the KOEO and KOER codes and one of the codes I got on the KOER (running) test is a 41.
The code tables on fordfuelinjection.com show a KOEO and CM code of 41 related to the right O2 sensor but don't show anything for a 41 on the KOER.
I'm a little confused on the code sequences.
I thought the codes you got with the key on but engine not running were the KOEO codes followed by the CM (continuous) codes. I got a KOEO of 67 (because I don't have the transmission harness) and a CM of 11 which indicates a System Passed. After I cranked the engine and it went thru it's testing procedure I got a code 41 and then a 33 which I took to be the KOER codes.
My confusion is that the code table I shows that a KOEO of 41 is No HEGO switching detected always lean (right side) and a CM of 41 is HEGO sensor circuit indicates system lean (right side); but no definition of a KOER of 41.
I think that a KOER of 41 would probably relate to the right side O2 sensor, but hoped it would tell be if it was just seeing a bad reading or didn't see the O2 sensor at all.
I guess the next diagnostic steps would be to switch sides with the O2 sensor to try to narrow it down to the sensor or the wiring? And then either replace the sensor or troubleshoot the wiring?
Thanks for your help. I'm new at trying to interpret EFI computer codes.
Lawrence Perry
I've got some kind of engine problem and ran the KOEO and KOER codes and one of the codes I got on the KOER (running) test is a 41.
The code tables on fordfuelinjection.com show a KOEO and CM code of 41 related to the right O2 sensor but don't show anything for a 41 on the KOER.
I'm a little confused on the code sequences.
I thought the codes you got with the key on but engine not running were the KOEO codes followed by the CM (continuous) codes. I got a KOEO of 67 (because I don't have the transmission harness) and a CM of 11 which indicates a System Passed. After I cranked the engine and it went thru it's testing procedure I got a code 41 and then a 33 which I took to be the KOER codes.
My confusion is that the code table I shows that a KOEO of 41 is No HEGO switching detected always lean (right side) and a CM of 41 is HEGO sensor circuit indicates system lean (right side); but no definition of a KOER of 41.
I think that a KOER of 41 would probably relate to the right side O2 sensor, but hoped it would tell be if it was just seeing a bad reading or didn't see the O2 sensor at all.
I guess the next diagnostic steps would be to switch sides with the O2 sensor to try to narrow it down to the sensor or the wiring? And then either replace the sensor or troubleshoot the wiring?
Thanks for your help. I'm new at trying to interpret EFI computer codes.
Lawrence Perry