Maybe.
Codes 121 and 122 are for the throttle position sensor circuit.
Code 400 is EGR and codes 449 and 452 are for the EVAP system.
Code 1639 is for a problem with the 5 volt reference circuit from the engine computer.
The throttle position sensor could be failing which could prevent the gas pedal from working. And the 5 volt reference problem could shut down the computer which would kill the engine. EGR is an emissions component and EVAP is the system that vents gas fumes from the gas tank.
Codes are only a guide for a mechanic to troubleshoot the circuits involved. They do not mean a component is faulty.
Testimonial: "Thank you stephen for your help............was just wondering if it could be an electrical problem with the wiring harness off the tank.."
SOURCE: CODE PROBLEMS
transmission problems take it to a transmission shop most likelt the torque converter
SOURCE: hyundai elantra stalls loss of power while
I just had this problem on a 2001 elantra. I took it in for repair: the MAP (Manifold Absolute Pressure/ intake air temp) sensor was shot. $150 later it works just fine.
SOURCE: engine codes po452, po440,po122. electrical problem?
You should have 3 grounds 1 from the battery to the engine one from the engine to the body and then from the engine to the frame. Look for these grounds they look like braided flat wire. I think you also may have a loose plug or a cut in the main harness from the rear of the vehicle. Look along the frame as the harness runs from back to front. Looking at your codes I do not think they are related to your electrical problem. I gave up trying to fix my gear indicator, I had to replace the fuel tank sensor to get my gas gage working right.
SOURCE: 1999 chevy siverado keeps giving
check the feul pressure regulator disconent the vacuum hose while engine is running and see if there is any fuel comming from the port on the regulator if there is replace the regulator
SOURCE: PO452 sensor needs to be
P0452 fuel tank pressure sensor-low voltage the sensor is located on the top of the fuel tank. try a new fuel cap before you replace any thing else, if the seal is bad on the cap it culd set the code.
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just wondering if it is still driveable have to go about 90km tomorrow
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