Chevrolet Full Size Cars 1979-1989

1986-89 Carbureted and Fuel Injected Engines

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  1. -No engine speed signal/diagnostic system functioning
  2.  
  3. -Open oxygen sensor circuit
  4.  
  5. -Coolant temperature sensor circuit (high temperature indicated)
  6.  
  7. -Coolant temperature sensor circuit (low temperature indicated)
  8.  
  9. -Throttle position sensor circuit (signal voltage low)
  10.  
  11. -Throttle position sensor circuit (signal voltage high)
  12.  
  13. -Mixture control solenoid circuit (signal voltage low)-carbureted vehicles
  14.  
  15. -Manifold air temperature sensor circuit (lower temperature indicated)-fuel injected vehicles
  16.  
  17. -Vehicles speed sensor circuit
  18.  
  19. -Manifold air temperature sensor circuit (high temperature indicated)-fuel injected vehicles
  20.  
  21. -Canister purge solenoid circuit-carbureted vehicles
  22.  
  23. -Barometric pressure sensor circuit (signal voltage low)-carbureted vehicles
  24.  
  25. -EGR circuit-fuel injected vehicles
  26.  
  27. -Manifold absolute pressure sensor circuit (signal voltage high/vacuum low)-fuel injected vehicles
  28.  
  29. -Manifold absolute pressure sensor circuit (signal voltage low/vacuum high)-fuel injected vehicles
  30.  
  31. -Pressure sensor circuit (signal out of range)-carbureted vehicles
  32.  
  33. -No distributor reference pulse
  34.  
  35. -Ignition control or electronic spark timing circuit
  36.  
  37. -Knock sensor or electronic spark control circuit
  38.  
  39. -Oxygen sensor circuit (lean exhaust indicated)
  40.  
  41. -Oxygen sensor circuit (rich exhaust indicated)
  42.  
  43. -PROM error (faulty or incorrect PROM)
  44.  
  45. -Calpack error (faulty or incorrect Calpack)
  46.  
  47. -EGR system malfunction-California carbureted vehicles
  48.  
  49. -Mixture control solenoid circuit (signal voltage high)-carbureted vehicles
  50.  
  51. -Fuel pump circuit (voltage low)-fuel injected vehicles
  52.  
  53. -ECM error-fuel injected vehicles
  54.  

 
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