What does P0691 Mean? The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. When you see P0691 engine fault code on your engine code reader this description will help you. engine code P0691P0691 fixobd P0691dtc P0691obd code P0691obd2 P0691P0691 car codediagnostic code P0691car code P0691check engine code P0691fehlercode P0691P0691 fiatcodigo P0691codigo falla P0691P0691 kody b??dówcodigo de falla P0691 What are the common causes of P0691 ? Common causes include a bad cooling fan motor or a faulty cooling fan relay. Less common causes include corroded or loose electrical connectors, a faulty engine coolant temperature sensor, and open or shorted electrical wiring (often resulting in a blown fuse). How do you troubleshoot P0691 ? With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Searches related to P0691 - Cooling Fan 1 Control Circuit Low p0691 subaru p0691 vw jetta p0691 audi p0691 ford p0691 peugeot p0691 ford s-max p0480 p0693