LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 1991 >> 900 SPG >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Fault Codes (Using ISAT Scan Tester)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fault Codes (Using ISAT Scan Tester)

Connect ISAT Scan Tester (available from manufacturer) according to manufacturer's instructions. Diagnostic connector is under right front seat, protected by a plastic cover. Follow instructions furnished with tester to retrieve codes.

TROUBLE CODE DEFINITION MENU (USING ISAT SCAN TESTER)

Permanent Fault Intermittent Fault Malfunction Indicated
42241 22241 Voltage Higher Than 16 Volts
42251 22251 Less Than One Volt At ECU Pin No. 4
42252 22252 Signal Voltage Less Than 10 Volts
42291 22291 Battery Voltage Less Than 10 Volts Or Higher Than 16 Volts
42440 22440 Rich Mixture: No Control By O2 Sensor
42441 22441 Rich Idle Mixture
42442 22442 Rich Mixture
42450 24250 Lean Mixture: No Control By O2 Sensor
42451 22451 Lean Idle Mixture
42452 22452 Lean Mixture
42460 (1) 22460 (1) O2 Sensor Signal Faulty
42491 22491 Incorrect Idle Mixture
42492 22492 Incorrect Mixture
44221 24221 Vehicle Speed Sensor Signal Absent
44261 24621 Vehicle Speed Sensor Signal Faulty
44360 24360 Crankshaft Sensor Signal Faulty
44460 (1) 24460 Load Signal Faulty
44461 24461 ECU Programming Fault: Outside Limits
44660 24660 Pre-Ignition Fault
44661 24661 Knock Sensor Signal Faulty
44671 24671 Pre-Ig. Signal Longer Than 20 Seconds
44662 24462 Pre-Ign. Synchronization Signal Faulty
45260 25260 Throttle Potentiometer Signal Faulty
45360 25360 Brake Signal Faulty
45641 (1) 25641 (1) Mass Airflow Meter Signal High
45651 (1) 25651 (1) Mass Airflow Meter Signal Low
45691 (1) 25691 (1) Mass Airflow Meter Signal Faulty
45723 25723 Transmission Range Signal/Function Faulty
45771 (1) 25771 Throttle Position Sensor Signal Shorted
45772 (1) 25772 TP Sensor Signal Indicates Idle & Full Throttle Simultaneously
46221 (1) 26221 Temperature Sensor Circuit Open
46261 26261 Temp. Sensor Signal Indicates Constant Temperature
46271 26271 Temperature Sensor Circuit Shorted
46391 26391 EGR System Function Faulty
58121 38121 MAF Meter Burn-Off Function Absent
58321 38321 AIC Valve Function Faulty
58322 (1) 38322 Canister Purge Valve Function Faulty
58371 (1) 38371 Injector Faulty
58372 (1) 38372 Canister Purge Valve Ckt Open Or Shorted To Ground
53882 (1) 38382 Canister Purge Valve Circuit Shorted To Battery Voltage
60000 - Internal Monitoring
60001 - ECU Fault
60002 - ECU Fault
67192 (1) - ECU Fault
(1) CHECK ENGINE light will be on.