Fault in EGR Diagnostics
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
Engine codes start at 11 Could it be 55 which means N/A
Trouble code P0108 means:Manifold absolute pressure/barometric pressure circuit high input
P0700 eatx code present. You need to have the transmission computer checked for codes. P0700 just means that the trans has a code.
Firing order 1 2 3 4 5 6 facing the engine closest toward you are from left to right 2 4 6 and on the other side 1 3 5 Engine Code EGA / EGH
Trouble code P0731 means:Gear 1 incorrect ratio
means its time to buy a Chevy
This is referring to the first Oxygen sensor, located on the exhaust manifold. It either indicates a short in the wiring or the sensor needs to be replaced altogether.
Trouble code P0321 means:Ignition/distributor engine speed input circuit range/performance
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0301 means:Cylinder 1 misfire detected
Trouble code P1391 means: Intermittent loss of CMP or CKP