bschelle Posted September 10, 2004 Report Share Posted September 10, 2004 99 DeVille, 111,000 miles. The abs & traction control lights are on and I lost first gear. The codes are PCM: P0741 History P1520 " No IPC No ACM No SDM TCS: C1243 History No PZM IRC: U1255 History No RFA What do you think the problem is? Thanks in advance, Bill. Link to comment Share on other sites More sharing options...
JimD Posted September 10, 2004 Report Share Posted September 10, 2004 Clear the codes and see what comes back as "current". The P0741 might be as simple as a brake pedal switch?? Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
bschelle Posted September 11, 2004 Author Report Share Posted September 11, 2004 Took it for a 15 mile ride and went to the store. When I got back in the car the lights were out and first gear was back. Did it today again. Cold the lights are on and no first but after a shut down and restart after warm all is good. The new codes were P0741 and C1243 and the SES light is on too. No other problems! Link to comment Share on other sites More sharing options...
JimD Posted September 11, 2004 Report Share Posted September 11, 2004 Your P0741 is causing the SES lamp. Easiest (and first) thing to check is the brake pedal switch or switches. Look for damaged wire and correct pedal-to-barrel gap. Your C1243 is a 'Brake Pessure Modulator Valve pump motor' code. Easiest (first) check is to locate and examine the fuses labeled "ABS MOT" (40 amp) and "ABS SOL" (30A). On a Seville, these fuses are in the underhood junction box. The C1243 should also cause the ABS warning and SERVICE STABILITY SYS message. Someone with Deville diagrams might jump in here..... Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
bschelle Posted September 13, 2004 Author Report Share Posted September 13, 2004 Thanks, I will check it out tonight. I pulled the mini fuses and cleaned them and the strange part is it seems to be happening only when I first drive it cold and after it warms up it doesn't do it for the rest of the day! Link to comment Share on other sites More sharing options...
Jim in Phoenix Posted September 14, 2004 Report Share Posted September 14, 2004 Did you carefully check the fluid level in the master cylinder? A low fluid level will set the restraints you speak of. There are two resevoirs and the fluid level would naturally be lower when cold, gradually expanding as you use the brakes. Do not go by the mud line on the plastic chamber! I always jiggle the car until I can see the fluid move. Jim in Phoenix Link to comment Share on other sites More sharing options...
bschelle Posted September 14, 2004 Author Report Share Posted September 14, 2004 Jim, Now that you mention it I just looked at the master from the outside and it looks to be half full. I will check it tonight and add some fluid. I will let you know how it goes. Thanks! Link to comment Share on other sites More sharing options...
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