Symptoms of a Bad or Failing Throttle Position Sensor Car won't accelerate, lacks power when accelerating, or accelerates itself. ... Engine won't idle smoothly, idles too slowly, or stalls. ... Car accelerates, but won't exceed a relatively low speed, or shift up. ...
Examples of sensors that can trigger limp mode include the mass air flow sensor (MAF), throttle position sensor (TPS) and manifold pressure sensor (MPS). Can faulty glow plugs cause limp mode? iStock.com/Denis_prof You may see the glow plug warning light while your car is in limp mode...