I have codes that I don't understand and I need to know exactly what's wrong. the codes are: P0139, P0400, P0325 and P0138.
Jul 31, 2019 at 3:27 PM
Trouble codes P0139, P0400, P0325 and P0138
2000 NISSAN QUEST
YOLANDA RICHARDSON2
- MEMBER
- 1 POST
- FOLLOW
Advertisement
Welcome to 2CarPros.
The codes are identified as the following:
P0138 - Rear heated oxygen sensor bank 1
P0139 - Rear heated oxygen sensor bank 2
P0325 - Knock sensor
P0400 - EGR (exhaust gas re-circulation)
____________________________________
Can you explain what the vehicle is doing? Also, the o2 sensors can be off due to either the EGR or the knock sensor. I don't see how the EGR and knock sensor are related. The EGR valve could be bad or even have a vacuum leak or carbon build up. The knock sensor, on the other hand, is either bad or has a bad connection. It is located under the intake manifold and not a 5 minute job.
Let me know what you are experiencing so I can better diagnose.
Take care,
Joe
The codes are identified as the following:
P0138 - Rear heated oxygen sensor bank 1
P0139 - Rear heated oxygen sensor bank 2
P0325 - Knock sensor
P0400 - EGR (exhaust gas re-circulation)
____________________________________
Can you explain what the vehicle is doing? Also, the o2 sensors can be off due to either the EGR or the knock sensor. I don't see how the EGR and knock sensor are related. The EGR valve could be bad or even have a vacuum leak or carbon build up. The knock sensor, on the other hand, is either bad or has a bad connection. It is located under the intake manifold and not a 5 minute job.
Let me know what you are experiencing so I can better diagnose.
Take care,
Joe
Jul 31, 2019 at 7:48 PM