P2070 DIAGNOSTIC CODE
Has anyone else ever had the engine code P2070 and the check engine light? I got it last night while on a trip from Los Angeles to Concord, California. The car ran fine all the time, but the light wouldn't go off. I thought it was a loose gas cap since my wife just filled the car about 40 miles earlier. She stopped and retightened the cap again, but it never fixed itself.
The dealership says it is for the INTAKE MANIFOLD TUNING VALVE. Mine was stuck open, so they want to replace it. I did some research, and found out that this valve opens and closes on driver demand to give crisper acceleration. When the valve is closed, the manifold acts as though it was one piece, and gives good driveability at slow speeds. But when the driver accelerates, the valve opens and splits the manifold into 2 pieces and gives more air to the engine for high speed. When they stick open it is becauseof the carbon buildup in the intake manifold. It could also be from bad gas, but they say excess carbon is the usual culprit. I guess I wil have to clean the intake manifold more than I have been.
This engine has a lot of PCV engine oil coming back into the throttle body. I always clean it out when I check my air filter. I can't say I like this very much. I notice the oil down inside the throttle body when I take off the black intake hose. This is the only car I've ever seen this in. I sent pictures of this oil when I first got my vehicle, and they said that it was normal. I found out that this engine was made by Isuzu in Japan and was adapted to our application. I've learned so much about this lately.
If you have over 50,000 miles like I do (66,000 miles), the extended warranty will have to pick it up. Luckily I bought it, and it is good until 111,000 miles since it was a certified vehicle when I bought it with 11,000 miles on it. I think I still have a $100.00 deductible, but I am at a loss as to how I can prevent it from happening again. I don't want it to happen again after my warranty has expired.
This is just something I think we should be aware of. I did research using GOOGLE and BING, and I believe that only the GMC ACADIA has had a posting or two about this code in this kind of vehicle. Please keep an eye out. I have the service manuals on this so I think I'll check it out tonight.
oh well, one engine code is not so bad I guess, but I still don't like it because I don't use cheap gas in my car.