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1991 Volvo 940 T 2.3L MIL Lamp on
Posted to European Driveability on 3/20/2007 3 Replies

This Volvo keeps setting codes 312 and 131 in the fuel ECU. Code will set after a few key cycles. Mitchell says check voltage at ECU. I have .96 volts at pin 28 on fuel ECU with key on. I have 5.5 volts at pin 1 with engine cranking. According to mitchell this...

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  Related Documents & Media  1991 Volvo 940 T

 
Message Closed w/Summary

car Vehicle Data

1991 Volvo 940 T

VIN YV1JA8748M
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

131Ignition rpm signal
312KnockFuel enrichment signal missing
Message Closed w/Summary

car Vehicle Data

1991 Volvo 940 T

VIN YV1JA8748M
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

131Ignition rpm signal
312KnockFuel enrichment signal missing