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Need help with a problem: P0322, no input signal

A8 / S8 (D2 Platform) Discussion Discussion forum for the D2 Audi A8 and S8 produced from 1994-2002

Need help with a problem: P0322, no input signal

 
Old 01-13-2019, 05:11 PM
  #1  
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Default Need help with a problem: P0322, no input signal

2000 A8
OBD2 code P0322
Ignition / Distributor
Engine Speed Input Circuit
No Signal
It will run for half a second upon start up, then nothing. Any help would be appreciated
Photonica is offline  
Old 01-14-2019, 07:47 AM
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Crank sensor.
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Old 01-14-2019, 11:34 PM
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Yup , Crank Sensor, I think Audi calls it Engine Speed Sensor G28? The ECU relies on the engine speed sensor to tell if the engine is running. If the sensor is dead, the ECU will cut fuel and engine dies. Does your tach show engine RPMs. It mounts on the top of the transmission at the back of the engine bay. When you first turn the key, the fuel pump runs briefly then stops. You crank it over, engine starts, and the rpms jump up over cranking speed. The ECU, sensing the engine speed increase, decides that the engine has started and allows the fuel pump and the injectors to keep running.

So, that would be a good guess.

Also,check for a wet ECU under the hood in the engine electrics box in the well by the firewall.

Regards,

Brian

Last edited by BrianC72gt; 01-15-2019 at 11:42 AM.
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