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Hi,

I have a brand new LSA crate motor and GM ECU (for an LS Engineswap) installed in my chevy 3100.

I started the engine for the first time ever yesterday and it started just fine, however I noticed the MIL light was on in the fuse box as well as the MIL wire I ran to a small light inside the cab, so I read the codes on a U-Scan tool and found the following.

P2135
P2176
P0651

Any idea's what's wrong (I didn't run the engine for more than 30 seconds or so as I didn't want to cause potential damage.

Here's hoping for some help.

Thanks
Shaun

Vehicle: Chevy LSA 6.2 supercharged

1 Answer

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P0651  5 volt reference 2 circuit

P2176 Minimum throttle position not learned

P2135 Throttle position 1-2 correlation

You only have one code condition as long as P0651 is present you can expect P2135 and P2176, You will need to measure the 5 volt reference of circuit 2. this circuit runs along a bus line that attatches to other sensor in the circuit such as the MAP sensor, the fuel tank pressure , the a/c pressure sensor,the APP sensor,the engine oil pressure, and the camposition sensor. as long as the 5 volt at the TPS is not met these 3 code will appear

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