Service engine soon appears on panel
E 44 is oxygen sensor signal lean e52 is pcm memory reset
SOURCE: service engine soon light on
E40 is a problem with the Power Steering Pressure switch. Most probable cause is that if work was recently done, someone forgot to put the wiring harness back on the pressure switch. The pressure switch is usually mounted on the high pressure line. It looks similar to an oil pressure switch. If the wiring is correctly installed, the switch is probably bad (assuming that your power steering works).
E52 is a PCM (engine computer) memory reset code. Have you disconnected the battery of late? If not, check all your fuses. One of the fuses for the PCM may have blown.
Charlie
SOURCE: I would like to find out what error codes
E26 - Shorted Throttle Switch Circuit
E27 - Open circuit in throttle switch
On these 2 codes replace the TPS and clear codes (throttle position sensor).
E52
PCM/ECM Memory Reset
Have u cleared the memory? don't worry about this code.
SOURCE: 1992 cadillac Deville OBD code read out and what it means.
E13-Oxygen sensor voltage stays between 0.307 and 0.609 volts for 64 seconds. Engine was at normal operating temperature at a speed over 800 RPM.
E44-Right oxygen sensor was lean for more than 50 seconds when engine was warm and at 800 RPM or greater.
E52-PCM has lost primary battery power.
E58-Pass Key fuel enable was not correct.
F47-PCM has received bad data from IPC for 3 seconds while engine speed was 500 RPM or more for 3 seconds.
F48-EGR open command was given during off idle operation. EGR opening should cause the mixture to be slightly richer because of the low oxygen content of exhaust gas. Vehicle speed was over 35 MPH and engine was warm.
Good luck and hope this helps, keep me posted be glad to answer any questions you may have.
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