Question about Cars & Trucks
Hello please could some ne help me i have had my car read and the codes that came up was p0603 and p0703 and u1900 please does any one know what this means i have replaced the brake switches but please if any one can help i would be more than great full
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Posted on Jan 02, 2017
I will make an assumption here, we know what the root word means. This code was extracted from the computer by? What this is telling you one of 2 things: The Bank 2 oxygen sensor down stream of the catalytic converter (there are 2 converters, one for each bank of cylinders on the 4.6ltr engine) is bad and/or that the Bank 2 catalytic converter is no longer doing the job it was designed to do. Simply, Catalysts wear out. They are good for approx 100,000 miles (as required by Federal Law). Again, I assume that the reason the intake manifold was replaced was because it had a crack in one, or more, of the runners? (part that feeds the head of a manifold). It may have taken a while to find this as being the cause of why the car running incorrectly, maybe rough. This means, that during the time the car was being driven with the problem, the amount of unburned, or not within spec exhaust gases, coming off the side of the engine affected by the intake issue was higher than normal. This out of balance level of exhaust gases were being dumped into the converter on that side of the engine, thus causing the converter to have to run hotter, work harder, or even at the time the gas was being processed through, causing deposits to be formed in the converter, thus shortening it's life span. The Bank 1 side of the engine, apparently, did not have the issue and it's catalytic converter's life was not affected. I hope this makes sense to you.
Posted on Aug 19, 2009
P0703 (M) Brake Switch Stuck Pressed or Released Incorrect input state
detected in the brake switch circuit (Changed from P1595).
The switch cost like 20 bucks. It is located on the brake pedal, it will either be in front of or behind the pedal at the top. It will have a plunger that contacts the pedal, and an electrical pig tail. usually you just twist it and pull it out kinda like a headlamp.
Hope this help (remember rated and comment this).
Posted on Mar 29, 2010
bottom line is the U1262 is a communication failure between your scanner and a module
assuming you actually pulled the code from the PCM then you have lost communication with a different module like the ABS, DDM, LCM, RASM, HEC, PAM and any other module I can't think of right now
You need a detailed pinpoint test from a Ford service manual or aftermarket source like Alldata, Shop key or Mitchell on Demand
You could be dealing with over a 100 different test PER module
Obviously something we can't do on-line too easily
If you could at least identify which module you have lost communications with your dealer may, for a fee, copy the correct pinpoint test
Posted on May 20, 2010
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