Cascabelea y pierde fuerza
#1
07-07-2011, 08:15 PM
Cascabelea y pierde fuerza
Buenas noches a todos, soy nuevo en este foro y quisiera toda la valiosa ayuda que me puedan brindar, tengo un hyundai accent 2002, de un momento a otro empezó a perder fuerza en subidas y a cascabelear, lo lleve al mecánico y me dio los siguientes códigos, PO507, PO121,PO171,P1401,P0385, todos están relacionados al sistema de inyección, pero lo que me extraña esque todos estos sensores los cambie hace 2 años, solo el P1401 es nuevo, ahora me dicen que posiblemente la faja de distribución se brinco un diente y debo de cambiarla, si alguien me puede ayudar mucho se lo agradecería.
#2
07-08-2011, 07:21 AM
P0507 - Idle Air Control System RPM Higher Than Expected
- A vacuum leak
- Leaking air intake after the throttle body
- EGR valve leaking vacuum
- A faulty positive crankcase ventilation (PCV) valve
- Damaged/failed/dirty throttle body
- Failed EVAP system
- Failed IAC (idle air controller) or faulty IAC circuit
P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem
- TPS has intermittent open or short internally
- Harness is rubbing and causing an open or short in the wiring
- Bad connection at the TPS
- Bad PCM (less likely)
- Water or corrosion in connector or sensor
P0171 - System Too Lean (Bank 1)
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
- There could be a vacuum leak downstream of the MAF sensor.
P0385 - Crankshaft Position Sensor B Circuit Malfunction
- Damaged CKP sensor connector
- Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway)
- Sensor output open
- Sensor output shorted to ground
- Sensor output shorted to voltage
- Failed crank sensor
- Failed PCM
P1401 has to do with the emissions system. My guess is you need to fix the sensors. Driving on bad sensors for 2 years is beginning to damage the emissions system.
- A vacuum leak
- Leaking air intake after the throttle body
- EGR valve leaking vacuum
- A faulty positive crankcase ventilation (PCV) valve
- Damaged/failed/dirty throttle body
- Failed EVAP system
- Failed IAC (idle air controller) or faulty IAC circuit
P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem
- TPS has intermittent open or short internally
- Harness is rubbing and causing an open or short in the wiring
- Bad connection at the TPS
- Bad PCM (less likely)
- Water or corrosion in connector or sensor
P0171 - System Too Lean (Bank 1)
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
- There could be a vacuum leak downstream of the MAF sensor.
P0385 - Crankshaft Position Sensor B Circuit Malfunction
- Damaged CKP sensor connector
- Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway)
- Sensor output open
- Sensor output shorted to ground
- Sensor output shorted to voltage
- Failed crank sensor
- Failed PCM
P1401 has to do with the emissions system. My guess is you need to fix the sensors. Driving on bad sensors for 2 years is beginning to damage the emissions system.
#3
07-08-2011, 11:14 AM
Thanks for your fast answer, but is normal to damage all these sensor at the same time, or maybe one sensor is the principal cause ?
