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1999 chevy lumina 3.1 has check eng light with trouble ...
Sent to Chevy Experts May 13 06:47 PM

1999 chevy lumina 3.1 has check eng light with trouble codes po449 p1870 what can i do to remedy this to pass inspection

 

Optional Information:
1999 Chevrolet lumina 3.1

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nothing yet

Customer (name blocked for privacy)
Status:  Closed   Value: $30
Answer
May 13 7:17 PM (30 minutes and 19 seconds later)
         
REPLIEDCheck Mark
Hi, P1870 is a code the transmission sets because the pcm has seen it slip for longer than expected. Usually this happens when the torque converter locks up in overdrive and even though it is designed to have some "slip" built into it, It happens for longer than the pcm expects. After seeing this at least 2 to 3 times, it will set the code. You can probably disconnect the battery to clear p1870 to make it through inspection. As for Po449 is for an emissions part called a vent solenoid. This is under the car mounted with the evap canister. Alot of times it goes bad, It has a fuse that controls it that you can check.Its a 5 amp fuse located in the fuse block (fuse no.42). If the fuse is okay, further checking under the vehicle is next. If you want me to give you further instructions on checking it let me know. Thanks Eric
PictureEric -- Master Technician/shop foreman -- 99% Positive Feedback on 239 Chevy Accepts
ASE Master Technician, 25 years experience, Over325 General Motors certifications
Reply
May 13 7:33 PM (16 minutes and 4 seconds later)
         
Reply to Eric's Post: yes that advice would be of great help in case the other things dont solve.
Customer (name blocked for privacy)
Answer
May 13 9:27 PM (1 hour and 54 minutes and 1 second later)
         
ACCEPTEDCheck Mark
Okay, for the evay vent solenoid. Get a test light unplug the solenoid (its located under the car on the canister) it has two wires in the plug, one pink(12v) and one white. Put a test light between them and your test light will either flash or (pulse),stay on or not light at all. You may want to start it up and check it also. Its tougher without a scan tool, because you can commmand it on and off at will. But you try this method and let me know the results. On the P1870 code there is not much i can talk you through on that one. It ivolves more complex diagnosis to get the root cause of the code. Let me know what ya find. Thanks Eric
PictureEric -- Master Technician/shop foreman -- 99% Positive Feedback on 239 Chevy Accepts
ASE Master Technician, 25 years experience, Over325 General Motors certifications
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