The engine management light is on it runs fine then every 5 miles or so the coil light comes on and the car will not go over 3000 rpm. If i turn it off and leave for a while the coil light goes off and its drives perfect again but management light stays on.. I checked it with dtc scanner comes up error code p0638... any ideas I heard it could be the lamba sensor or the throttle body????? Cheers
This is the case of a failed motorized throttle body that should be replaced.
SOURCE: 2004 Honda Civic -Code P0122 Throttle Position Sensor Voltage Low
yes, this is the case of a failed throttle body, in which case it needs replaced, the car is getting too much fuel causing the high idle. this needs replaced asap. you could proably find a small independant honda shop that could do the work for less.
SOURCE: stalling, 'reduced power' light, and OBD code P1125 Manufacturer control air metering...
These trucks have a drive by wire system,we seen a` lot with a broken ground wire on the rear of the drverside cyl head,this is hard to see just feel and give the wire a tug .If the wire is loose or broken the reduced engine power light will come on.
SOURCE: grinding noise while driving.
Possible causes:
a) a brake disc shield is too close to the disc, and it's coming into contact in the circumstances you outline
b) pebbles stuck between the disc shield and the disk
c) dried out wheel bearings
d) worn Universal Joints in the drive shafts
e) worn A/C pump
f) worn alternator
g) worn water pump
Is the noise still present above 15 miles an hour and past 1500 rpm when the clutch is disengaged (i.e. gearbox in neutral?). The answer to this question may help you to pinpoint the source. I know it's stating the obvious but the fact that you're hearing a grinding sound means it's caused by something that is moving relative to something else. Again this should help narrow down the cause.
SOURCE: Jaguar x type 2004 2.5 petrol V6, 38500 miles, codes P0171, P0174
Have exactly the same issue on 04 jag x type 2.5. So far have replaced fuel filter, air filter k&n, plugs ngk. Codes cleared, same issue. Seems to appear when air temp is cold and eng is warm.
Am replacing upstream O2 sensors and cleaning MAF next. Will keep you posted if it clears up. Did you ever find the cause?
SOURCE: 2004 Mitsubishi Colt 1.1 Engine management light & code P0122
My girlfriends car has just started with the same problem, a limp home from the garage, a sleep over night and als well next day, for a while... I spoke to Mitsubishi and they have told me the TPS (throttle positioning sensor) is on the accelorator pedle assembly. There PN for this is MN125791 and its circa £88 + VAT. After exhausting all other options I may attempt this replacement and will advise the results.
The check engine light/service engine soon (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system u will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, it is done with a special system scanner
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