Three Greatest Moments In Audi G28 History

How to Replace an programming audi key G28 Engine Speed Sensor

In this video, Charles the Humble Mechanic shows how to replace the G28 engine speed sensor. This sensor is situated near the transmission's edge, above the flywheel gear. It transmits a signal to the ECU via an uncolored wire T55/49, then to the tachometer in the instrument cluster.

1. Engine Speed Sensor

Located on the edge cost of audi key replacement the transmission just above the flywheel ring gear the G28 Engine Speed Sensor sends an electrical signal to ECU pin T55/49 using an uncolored wire. The ECU then utilizes this information to regulate the flow of fuel, timig and boost. It also sends signals to the G5 Tachometer located in the instrument cluster.

The sensor serves as a reference point to connect with the G40 Camshaft Position Sensor. The ecu must know when the crankshaft reached TDC, and where the camshaft lies so that it can activate the spark and injectors.

If this sensor fails when it fails, the ECU will display a P00160 error message. This indicates that the Crank Shaft is not in line with the Intake Camshaft. It could also be a sign of an issue with the chain or a jump in the chain link of the upper chain of timing. However, the code won't appear on its own without additional information from other sensors (G4 and G40).

Testing can be a bit difficult because there are two connector pins and they perform different functions however the best way to test it is to measure resistance between the sensor and the ECU. When the sensor is fully operational, it should read about 1000 ohms. Check for evidence of coolant or oil in the connector bay if you are experiencing issues with this part.

2. Injectors

Yesterday accelerating full speed from highway paytoll i had a big cut in power like the engine is running out of gas or injectors aren't firing anymore. Today, i pulled out the spark plugs. Three were soaked with gazoline and the 4th one was dry. I placed a tissue over each injector hole, and when I start the engine with no sparks, the three that have gazoline pop right out. The 4th one stays closed. I checked the ground connection of ECU pins 14,30 and 48/55. I found 0ohm. I'm assuming the issue is elsewhere.

I also tried to reset PID but without success. The car will start when the G28 is disconnected, but it works fine when the G28 connected. However the intermittent misfire issue continues to occur at higher RPM. The coolant sensor (G62) even when unplugged, still shows a temperature of -49c. Also, i noticed that the oil pressure gauge in the cockpit is showing 2 bar while the actual pressure is 0.0 when i rev the engine.

I'm not certain what to do, as i think i've pretty much ruled out everything else. I'm concerned that i may have missed something. Let me know If you have any suggestions! TIA!

3. Fuel Pump

The fuel pump of the g28 gets a signal from the RPM sensor. The GM-style transmitter is the same as the G4 and both function in the 80 100 200, UrS and RS2 cars which is why you can easily locate one at a junkyard or in a local parts store. It is simple to test them - put your DMM in resistance mode and take measurements between pins 1 (with the bump on the connector end up) and 2 (2nd from the left on the black connector's end). They must be infinite Ohms.

4. ECU

Our 20vt turbo (3B AAN, ABY and ADU) engines have an ECU that must know the speed and position of the crankshaft to make decisions about fuel injector timing 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 go badly, you will see codes on the diagnostic scanner which could cause engine shut down.

The signs of a failing G28 sensor are an inaccurate rev counter in the gearbox and gears that shift faster than normal and/or a misfire when you're in gear. If you experience any of these issues, it is likely your sensor is deteriorating and requires replacement. The good thing is that they are quite affordable and readily available, especially when you're looking at the Bosch unit which is what we have. You can also choose the GM version of this part is also a great 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 key shell, as it transmits information to the ECU about how fast or slowly the engine is spinning. This sensor can cause the transmission to fail and other components in the car to be affected.

The G5 engine sensor is located at the outskirts of the transmission, over the flywheel ring. It sends signals via gray wire to ECU pin T55/49. The ECU utilizes this signal to control fuel and boost, as well as timig. It also sends it to the G5 Tachometer located in the instrument cluster. You can test the sensor for failure by checking continuity between it and the tachometer. You can also check continuity between ECU pin T55/49 and the instrument cluster connection on pin T6a/1 (trace [79trace [79]) and between pin T6a/1 and the instrument cluster pin T26a/12. You should observe around 1000 ohms of resistance between those points. This part is common across the audi new key tt key fob not working - just click the up coming internet page - 80-100-200-RS2 series, starting from the 1985 MC up to the 1997 UrS An and 1995 RS2 Du So, you may find good ones in wrecking yards.