Diagnostic
Trouble Codes
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DTC's A2 Engine 1993-1996
Volvos
To
start, the Ignition key must be in position II, engine not running.
Locate the two diagnostic sockets just inboard of the washer fill cap.
The "A" connector (shown above) has a jumper that is stored in the lid
of the "A" diagnostic connector. The jumper is used for both diagnostic
connectors. Put the jumper into A2 and push the black button
for one second. Count the red LED light as it blinks back information,
blink, blink, pause, blink, blink, blink, pause, blink, blink, is an
example of the response you would receive. 2-3-2 would be the code
retrieved, now push the button again for one second, again count the
blinks, keep checking for codes until one of them repeats, this means
you have read all the codes. Now to clear the codes, push and hold the
button for 6-7 seconds, release and as soon as the LED comes on push
and hold the button for another 6-7 seconds. Now push the button for
one second and read the codes again, you should get 1-1-1 (no faults).
You Must Read All
Codes before Clearing.
Turn the ignition off and then start the car, the check engine light
should be out. It is always a good idea to check for codes, clear them
and then drive the vehicle to see if they return, CEL or MIL, before
replacing parts.
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A2 Engine Codes
Continued
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TPS
Is Faulty At Idle Cylinder 3 Injector Signal Is Faulty Front Knock
Sensor Missing or Faulty Missing or Faulty Load Signal Missing or
Faulty Air Pump Signal Rear O2 Signal Missing or Faulty EGR Flow is Too
High Cylinder 5 Injector Signal is Faulty Front Oxygen Sensor is
Missing or Faulty TPS Fault at Full Load RPM Signal Reversed or Faulty
Long Term Fuel Trim Lean at Partial Throttle System Relay Signal
Missing or Faulty IAC Valve Missing or Faulty AC Pressure Signal
Missing or Faulty Long Term Fuel Trim at Limits at Partial Throttle
Long Term Fuel Trim at Limits at Idle Idle Air Trim Exceeds Control
Limits EGR Controlller Signal Missing or Faulty EGR Flow is Too Low No
Stored Fault Codes Control Module Fault Long Term Fuel Trim Lean
Injector Group 2 Signal Faulty Missing or Faulty MAF Signal IAT Sensor
Missing or Faulty ECT Signal Missing or Faulty Cylinder 2 Injector
Signal is Faulty Missing RPM Signal From ICM Battery Voltage Too High
or Too Low TPS Signal Exceeded Limits IAC Valve Closing Signal Missing
or Faulty Vehicle Speed Sensor Missing Knock Enrichment Signal From ICM
Missing Cam Position Sensor Missing or Faulty Maximum Compensation Rear
O2 Sensor EVAP Valve Faulty Signal Misfire On More Than One Cylinder
Misfire On At Least One Cylinder Multiple Misfires w/ Catalytic
Converter Damage Cylinder 5 Misfire w/ Catalytic Converter Damage EVAP
System Cold Start Inj Sig Shorted to Ground or Missing MAF Sensor Burn
Off Signal Too Low MIL Signal Faulty Memory Failure Request for MIL
from TCM Faulty AC Relay Signal Faulty Fuel Pump Relay Faulty EGT
Signal Missing or Faulty TPS Signal Exceeded Voltage Limits EGR
Temperature Signal Missing or Faulty Boost Pressure Regulator Too High
Boost Pressure Reduction from TCM Rear O2 Sensor Control Control Module
Box Temperature Too High Rear Knock Sensor Missing or Faulty Slow Front
O2 Sensor Air Pump Relay Signal Missing or Faulty Catalytic Converter
Efficiency Low Acceleration Signal Too High or Too Low Misfire Cylinder
1 Misfire Cylinder 2 Misfire Cylinder 3 Misfire Cylinder 4 Misfire
Cylinder 5 Longterm Idling Fuel Trim at Low Limit Longterm Fuel Trim
Too Rich Control Module Box Temp High Level 2 Low Speed Engine Fan
Faulty High Speed Engine Fan Faulty Front O2 Sensor Heating Faulty
Front O2 Sensor Heating Faulty Control Module Box Short Circuit to
Cooling Fan Torque Limit Signal Fault to ECM Power Stage in ICM Group A
Unknown Fault Power Stage in ICM Group B Unknown Fault Power Stage in
ICM Group C Unknown Fault Power Stage in ICM Group D Unknown Fault
Power Stage in ICM Group E Unknown Fault Multiple Misfires w/ Catalytic
Converter Damage Cylinder 1 Misfire w/ Catalytic Converter Damage
Cylinder 4 Misfire w/ Catalytic Converter Damage Turbo Control Valve
Shorted or Open A Control OK RPM Compensation for Transmission OK RPM
Signal OK RPM Signal from ICM OK TPS Signal OK at Idle TPS Signal OK at
WOT Cam Position Sensor OK Vehicle Speed Signal OK Injector Cylinder 1
Injector Cylinder 2 Cylinder 2 Misfire w/ Catalytic Converter Damage
Cylinder 3 Misfire w/ Catalytic Converter Damage Engine Fan Low Speed
Engine Fan High Speed Control Box Cooling Fan Injector Cylinder 3
Injector Cylinder 4 PAIR Pump Valve Injector Cylinder 5 Mail Relay IAC
Valve EGR Converter Basic Transmission Rate Speed X2 Speed X10 Canister
Purge Valve 2hz AC Relay Fuel Pump Relay PAIR Pump Relay
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