01-20-2018, 09:02 AM
TPS issues are real, but usually after a long service life.
My wife had a 2008 Hyundai Santa Fe 3.3 V6 and it went into limp mode while I was driving. Top speed about 10 MPH. After restarting, it behaved normal. After it did it again, I replaced the TPS. May have only been a connection issue, especially since I routinely clean the engine.,,but it had about 120,000 miles on the odometer.
Not wanting to experience limp mode again, it was best to replace it....no tests done other than using my OBDII plug-in unit.
However, with a fairly new TPS (age or miles), with little operation to damage the internal wipers, I remain skeptical that Keihin produced very many defective units.
I have not opened one, but expect the wipers to be redundant several times over *. Failure could occur if
a. All the wipers broke or lost spring pressure
b. Resistor damaged/worn
c. A lot of crud inside.
* The industrial automation company that fed my family for decades built systems to assemble and test several automotive sensors. All the ones with moving parts for variable resistance had multiple wipers (contact fingers).
Again, since the issue is intermittent and with sensors relatively young, I would thoroughly check for good connector connections.
My wife had a 2008 Hyundai Santa Fe 3.3 V6 and it went into limp mode while I was driving. Top speed about 10 MPH. After restarting, it behaved normal. After it did it again, I replaced the TPS. May have only been a connection issue, especially since I routinely clean the engine.,,but it had about 120,000 miles on the odometer.
Not wanting to experience limp mode again, it was best to replace it....no tests done other than using my OBDII plug-in unit.
However, with a fairly new TPS (age or miles), with little operation to damage the internal wipers, I remain skeptical that Keihin produced very many defective units.
I have not opened one, but expect the wipers to be redundant several times over *. Failure could occur if
a. All the wipers broke or lost spring pressure
b. Resistor damaged/worn
c. A lot of crud inside.
* The industrial automation company that fed my family for decades built systems to assemble and test several automotive sensors. All the ones with moving parts for variable resistance had multiple wipers (contact fingers).
Again, since the issue is intermittent and with sensors relatively young, I would thoroughly check for good connector connections.