ktgwx95@rxss1.jenniferlawrence.uk – https://www.thekeylab.co.uk/audi-car-keys/

How to Replace an Audi G28 Engine Speed SensorCharles the Humble Technician shows you how to replace the G28 Engine Speed Sensor. This sensor is situated near the transmission’s edge just above the flywheel gear. It sends a message to the ECU through the grey wire T55/49 and then to the tachometer in the instrument cluster.1. Engine Speed SensorThe grey wire is situated on the outside of the transmission, just above the flywheel ring. This sensor sends an electrical signal through the grey wire to pin T55/49. The ECU utilizes this information to control the amount of fuel and boost. It also sends an alert to the G5 Tachometer located in the instrument cluster.The sensor is used to link with the G40 Camshaft position Sensor. The ecu must be aware when the crankshaft is TDC and where the camshaft is so it can trigger spark and injectors according to the situation.If this sensor fails to function, the ECU will display an error code P00160. This indicates that the Crank Shaft is out of line with the Intake Camshaft. It could also be a sign of the possibility of a chain stretch or jumpy chain link in the upper timing chain. However, the error code won’t be displayed on its own without additional information from other sensors (G4 and G40).Testing is a bit tricky as there are two different connector pins, and they perform different functions but the best method to test it is to measure the resistance between the sensor and the ECU. When audi replacement car keys is fully operational, it should be reading about 1000 ohms. Check for signs of coolant, or oil in the connector bay if you have issues with this part.2. InjectorsYesterday, while accelerating at full speed from the highway paytoll, i experienced a big cut in power as if the engine was running out of gas or injectors are not firing any more. This morning i pull out the spark plugs, 3 were drenched with gazoline the 4th one was dry. I placed a tissue over each injector hole, and when I start the engine with no sparks, the 3 that have gazoline pop right out. The 4th one remains closed. I tested the ground connection of ECU pins 14,30, and 48/55. I found 0ohm. Therefore, i think the issue is somewhere else.I also tried to reset the PID but without success. The car will start when the G28 is unplugged, and it works fine when the G28 connected. However the intermittent misfire issue still occurs at higher RPM. The coolant temperature sensor (G62) shows the wrong temp value that is -49c even after unplugging it. I also noticed that the oil gauge in the cockpit shows 2 bar while the actual pressure is zero.I’m not certain what to do, i think i’ve pretty much eliminated everything else. But i am afraid I might have missed something. Please let me know should you have any suggestions! TIA!3. Fuel PumpThe fuel pump on the g28 is activated by a signal sent by the RPM sensor. The GM-style sender is identical to the G4 and they both work in the 80, 100, 200, UrS and RS2 cars which is why you can easily locate one at a wrecking yard or from a parts store. It is simple to test them – simply put your DMM into resistance mode and test the distance between pins 1 and 2 (with the bump on the connector’s edge facing upwards). They must be infinite Ohms.4. ECUThe ECU in our 20vt turbo (3B AAN ABY ADU) engines must be aware of the position and speed the crankshaft in order to make a decision about timing of the fuel injector, etc. In order to do this it makes use of a Crank Position Sensor (G4) and an Engine Speed Sensor (G28). If either of these goes badly, you will see codes on the diagnostic scanner that could cause engine shut down.Some of the signs of a malfunctioning G28 sensor include an inaccurate rev counter for the gearbox the gears are shifting faster than normal, and/or a misfire when you’re in gear. If you have any of these issues, it is most likely that your sensor is deteriorating and needs replacing. The good news is they are quite affordable and readily available, especially in the case of a Bosch sensor, which is what ours are. Alternately, the GM version of this component is also a good option.5. TachometerA damaged engine sensor could cause a variety of issues in your vehicle. It’s a crucial component of the transmission of your Audi since it sends information to the ECU regarding how fast or slow the engine is turning. If this sensor fails, it could disrupt the performance of the transmission and the rest of the car’s components.The G5 engine sensor is located at the edge of transmission, above the flywheel ring. It transmits a signal via a gray wire to the ECU pin T55/49. The ECU uses this signal to regulate fuel and boost, as well as timig. It also transmits it to the G5 Tachometer located in the instrument cluster. You can check the sensor for failure by examining the continuity between it and the tachometer, between the ECU pin T55/49 and the instrument cluster connection on pin T6a/1 (trace [79]) and between pin T6a/1 and the instrument cluster pin T26a/12. You should detect a resistance of approximately 1000 ohms in these areas. This is a standard component across the Audi 80, 100, 200, UrS and RS2 range from 1985 MC until the 1997 UrS AAN and 1995 RS2 ADU, so the best ones could be available in wrecking yards.