10 Times You ll Have To Be Aware Of Audi G28

How to Replace an audi key replacement near me G28 Engine Speed Sensor

Charles the Humble Technician teaches you how to replace audi key the G28 Engine Speed Sensor. This sensor is located near the transmission's edge, above the flywheel gear. It transmits a signal the ECU via the grey wire (T55/49), then to the tachometer in the instrument cluster.

1. Engine Speed Sensor

The grey wire is located at the edges of the transmission, directly above the flywheel ring. This sensor sends signals through the grey wire to pin T55/49. The ECU then uses this information to control the boost, fuel, and timig. It also sends signals to the G5 Tachometer located in the instrument cluster.

The sensor is used to correlate with the G40 Camshaft position Sensor. The ecu must be aware when the crankshaft is TDC and the location of the camshaft so it can activate spark and injectors accordingly.

If this sensor fails when it fails, the ECU will display a P00160 error message. This indicates that the Crank Shaft is not in sync with the Intake Camshaft. It could also be a sign of an issue with the chain or a jumpy chain link in the upper chain. The code won't appear without the additional information provided by other sensors (G4 or G40).

It can be a bit difficult to test because there are various connector pins, and they all have different functions. The most effective method to test it is by measuring the resistance between the ECU and the sensor. If the sensor is operational, it should read approximately 1000 ohms. Look for evidence of coolant or oil in the connector bay if you have issues with this part.

2. Injectors

Yesterday accelerating full speed from highway paytoll, i experienced a big cut in power like the engine is running out of gas or injectors are not firing at all. This morning i pull out the spark plugs. Three were drenched in gazoline, the fourth one was dry. When I start the engine without sparks i put tissue on the top of each of the injector holes and the 3 drenched with gazoline jump out but the 4th one stays closed. I checked the ground connection on ECU pins 14/55, 30/55 and 48/55. I got zero ohm. I assume that the problem is elsewhere.

I also tried to reset the PID without success. The car is able to start if the G28 is not plugged in and is running fine when it is connected however it has the intermittent misfire issue at higher RPM. The coolant sensor (G62) even when unplugged, still shows temperatures of -49c. I also noticed that the gauge for oil pressure in the cockpit shows 2 bar when the actual pressure is 0.0 when I crank up the engine.

I'm not certain what to do, but i feel i have pretty much eliminated everything else. I'm worried that i might have missed something. If anyone has suggestions, please chime in! TIA!

3. Fuel Pump

The fuel pump in the g28 can be activated by a signal by the RPM sensor. The GM-style transmitter is identical to the G4 sender and both work on the 80,100,200, UrS, and RS2 vehicles. It is easy to find the spare in a salvage shop or a parts store. Test them out - put your DMM in resistance mode and measure the resistance between pins 1 (with the bump on the connector end up) and 2 (2nd from left on the black connector's end). They must be infinite Ohms.

4. ECU

The ECU in our 20vt turbo (3B AAN ABY) engines must be aware of the speed and position of the crankshaft in order to make a decision about timing of the fuel injector, etc. To do this, it uses a Crank Position Sensor (G4) and an Engine Speed Sensor (G28). If you are experiencing issues with either of these sensors, the diagnostic scanner will show codes that could lead to an engine shutdown.

Some of the signs of a failing G28 sensor are an inaccurate rev counter for the gearbox the gears are shifting faster than normal and/or misfiring when you're in gear. If you have any of these issues, it is likely your sensor is going bad and should be replaced. The good thing is that they are very affordable and easily accessible, especially in the case of the Bosch sensor, which is what ours are. If you prefer, GM's version of this part is an option.

5. Tachometer

A failing engine sensor could cause a variety of issues within your vehicle. It is an important part of the transmission of your audi tt Key Case because it relays information to the ECU on how fast or slowly the engine is turning. This sensor can cause the transmission to malfunction and other components of the replacement car key audi to be affected.

The G5 engine sensor is located at the outskirts of transmission, above the flywheel ring. It sends a signal via an uncolored wire to the ECU pin T55/49. The ECU then uses and processes the signal to control fuel, timig, and boost, and also transmitting it to the G5 tachometer in the instrument cluster. You can check for sensor failure by examining the continuity from the sensor to the tachometer. You can also examine the continuity between pins T55/49 of the ECU and pin T6a/1 of the instrument cluster (trace [79]) and between pin T6a/1 as well as pin T26a/12. You should see approximately 1000 ohms of resistance between these two points. This is the same across the audi connect key 80-100-200-RS2 range, from the 1985 MC all the way up to the 1997 UrS AN and the 1995 RS2 DU, so you might find good ones in wrecking yards.