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I got a 91 Deville and the Service Engine Soon Light came on yesterday and i pulled the codes
by following the instructions i found on this forum and i got these :

E040 Power steering Pressure switch open
E052 PCM Memory Reset
E090 VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem


How can i fix these problems or clearr the coddes? The car from time to time feels like its going to stall when im just cruising or on a stopp.
 

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White Diamond '03 DHS (with DTS floor shift)
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E040 Power steering Pressure switch open
Sounds like a bad switch. R & R (remove & replace)

E052 PCM Memory Reset
Pulled battery power lately?

E090 VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem
This switch is at the top of the brake pedal. Not sure if that code is indicating a bad switch or not.
 

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'87 SDV
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How can i fix these problems or clearr the coddes?
To clear ECM codes: Enter diagnostics, let code cycle run until .7.0 appears. Press OFF and HI simultaneously and hold until E.0.0 appears. Exit diagnostics.

To clear BCM codes: same as above, just hit OFF and LO instead until F.0.0 appears.

This doesn't solve the problem, it merely clears the codes. Exisiting problems will just reset the codes in time.
 
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