Engine turns over but wont start p1517 code logged in engine ecu

check the engine oil level sensor and the oil pressure sensor. this can sometimes be the problem. if the ecu does not read oil or pressure it wont start, and there is no codes. just oil light wont go out on turning engine over.(that's for oil level) oil pressure the engine on turnover pushes the oil up to the sensore when ecu reads pressure from the sensor it turns on the rest of the ignition circuit and engine will start.

This is related to Power Supply Relay for ECU (J271 or J363)

More info at ross-tech:
http://wiki.ross-tech.com/wiki/index.php/17925/P1517

try googling yout vehichle year make and model followed by fault code p1517

possibly fuel problem or blocked egr valve

ecm goes bad it will go in limp mode, vechicle will run poorly check engine light will stay on vechicle wont start.you need to use a code scanner check for ecm fault code, if check engine light not turning on when you start vechicle could have blowed ecm fuse or wiring problem, could have loose connection at ecm electrical connector or ecm getting poor ground but first check for a defective ecm using a code scanner.

Hi there,

Code P1517 is specific to VW (P0 = generic code), so this code must be retrieved specifically from VW's DTC list.

This code relates to a malfunction in your Engine (MAIN) Control Relay circuit

Please note that I said "Circuit". This doesn't neccessarily mean the Control Relay itself is faulty (although this component will also need to be tested), but means you may need to test every component related to this circuit, and also other related circuts.

Cheers,


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You might want to check the ECU of the engine that u swapped it to. Because the original ecu is only for the 1.4L non vtec!!!

its built into the ECU

Did you scan for any trouble codes? Whenever the 'CHECK ENGINE' (Service Engine Soon) light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on. You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps fix the problem.

Which one is it?... Elantra?... or Santa Fe? In either case, the problem could be fuel pressure (fuel pump), then again, it might be crank sensor, coolant temp snsr, Intake Air Temp snsr. Have you scanned it for any trouble codes? Did the 'Check Engine' Light come ON? Whenever the 'CHECK ENGINE' (Service Engine Soon) light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.