Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM1990DAKOTA LE, 2D PICKUP, 3.9 X, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 2.5LDIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION (TURBO)
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, Automatic
Diagnostic Trouble Code (DTC) Identification (Turbo)
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, AutomaticSECTION Diagnostic Trouble Code (DTC) Identification (Turbo)
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION (TURBO)
| Code | Display on DRB-II | Fault Condition | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | IGN Reference Signal | No Distributor Reference Signal Pickup During Cranking. | ||||||||||||
| 12 | Number of Key-Ons Since Last Fault Or Since Faults Were Released | Direct Battery Input To SBEC Was Disconnected Within Last 50-100 Ignition Key-Ons. | ||||||||||||
| 13 | Map Pneumatic Signal | No Difference In Map Sensor Signal Is Detected. | ||||||||||||
| 13 | Map Pneumatic Change | No Difference Is Detected Between Map Reading & Stored Barometric Pressure Reading. | ||||||||||||
| 14 | Map Voltage Too Low | MAP Sensor Input Less Than Minimum Acceptable Voltage. | ||||||||||||
| 14 | Map Voltage Too High | MAP Sensor Input More Than Maximum Acceptable Voltage. | ||||||||||||
| 15 | Vehicle Speed Signal | No Distance Sensor Signal Detected With Road Load Conditions. | ||||||||||||
| 17 | Low Engine Temp | Coolant Temperature Stays Below Normal Operating Temperature During Vehicle Operation. | ||||||||||||
| 21 | O2 Sensor Signal | No Rich Or Lean Signal Is Detected From O2 Sensor Input. | ||||||||||||
| 21 | O2 Sensor Shorted Hi | Oxygen Sensor Input Voltage Maintained Above Normal Operating Range. | ||||||||||||
| 22 | Coolant Voltage Low | Coolant Temperature Sensor Input Below Minimum Acceptable Voltage. | ||||||||||||
| 22 | Coolant Voltage High | Coolant Temperature Sensor Input Above Maximum Acceptable Voltage. | ||||||||||||
| 23 | (1) T/B Temp Voltage Low | Throttle Body Temperature Sensor Input Below Minimum Acceptable Voltage. | ||||||||||||
| 23 | (1) T/B Temp Voltage Hi | Throttle Body Temperature Sensor Input Above Maximum Acceptable Voltage. | ||||||||||||
| 23 | (2) Charge Temp Volt Low | Charge Temperature Sensor Input Below Maximum Acceptable Voltage. | ||||||||||||
| 23 | (2) Charge Temp Voltage Hi | Charge Tenperature Sensor Input Above Acceptable Voltage. | ||||||||||||
| 24 | TPS Voltage Low | TPS Sensor Output Less Than Minimum Acceptable Voltage. | ||||||||||||
| 24 | TPS Voltage High | TPS Sensor Output More Than Maximum Acceptable Voltage. | ||||||||||||
| 25 | AIS Motor Circuits | Shorted Condition Detected In One Or More Auto Idle Speed Control Circuits. | ||||||||||||
| 27 | INJ 1 Control Circuit | Inj 1 Injector Bank Output Driver Stage Does Not Respond Correctly To SBEC Control Signal. | ||||||||||||
| 27 | INJ 2 Control Circuit | Inj 2 Injector Bank Output Driver Stage Does Not Respond Correctly To SBEC Control Signal. | ||||||||||||
| 27 | INJ 3 Control Circuit | Inj 3 Injector Bank Output Driver Stage Does Not Respond Correctly To SBEC Control Signal. | ||||||||||||
| 27 | INJ 4 Control Circuit | Inj 4 Injector Bank Output Driver Stage Does Not Respond Correctly To SBEC Control Signal. | ||||||||||||
| 31 | Purge Solenoid Ckt | Open Or Shorted Condition Is Detected In Purge Purge Solenoid Circuit. | ||||||||||||
| 32 | EGR Solenoid Circuit | Open Or Shorted Condition Is Detected In EGR Solenoid Circuit (CA Only). | ||||||||||||
| 32 | EGR System Failure | SBEC Did Not Detect Required Air/Fuel Change During Diagnostic Test (CA Only). | ||||||||||||
| 33 | A/C Clutch Relay Ckt | Open Or Shorted Condition Detected In A/C Clutch Relay Circuit. | ||||||||||||
| 34 | (3) S/C Servo Solenoids | Open Or Shorted Condition Detected In Speed Control Vacuum Or Vent Solenoid Circuits. | ||||||||||||
| 35 | Radiator Fan Relay | Open Or Shorted Condition Detected In Radiator Fan Relay Circuit. | ||||||||||||
| 36 | (4) Wastegate Solenoid | Open Or Shorted Condition Detected In Turbocharger Wastegate Control Solenoid Circuit | ||||||||||||
| 36 | (2) VNT Solenoid #3 CKT | Open or Shorted Condition Detected in VNT Solenoid No. 3 Circuit. | ||||||||||||
| 37 | PTU Solenoid Circuit | Open Or Shorted Condition Detected In Torque Converter Part Throttle Unlock Solenoid Circuit. | ||||||||||||
| 41 | Alternator Field Ckt | Open Or Shorted Condition Detected In Alternator Field Circuit. | ||||||||||||
| 42 | ASD Relay Circuit | Open or Shorted Condition Detected in Alternator Field Circuit. | ||||||||||||
| 42 | (5) Z1 Voltage Sense | No Battery Voltage Sensed When ASD Relay Is Energized. | ||||||||||||
| 45 (5) | Boost Limit Exceeded | MAP Reading Above Overboost Limit Detected During Engine Operation. | ||||||||||||
| 46 | Battery Voltage High | Battery Voltage Sense Input More Than Target Charging Voltage During Engine Operation. | ||||||||||||
| 47 | Charging Output Low | Battery Voltage Sense Input Less Than Target Charging Voltage During Engine Operation And No Significant Active Test Of Alternator Output. | ||||||||||||
| 51 | Lean F/A Condition | O2 Sensor Input Indicates Lean Air/Fuel Ratio During Engine Operation. | ||||||||||||
| 52 | Rich F/A Condition | O2 Sensor Input Indicates Rich Air/Fuel Ratio During Engine Operation. | ||||||||||||
| 53 | Internal Self-Test | SBEC Detects Internal Failure. | ||||||||||||
| 54(5) | Sync Pick-Up Signal | No High Data Rate Detected During Engine Rotation. | ||||||||||||
| 55 | (6) | Completion Of Fault Code Display By Check Engine Light. | ||||||||||||
| 61 (5) | Baro Read Solenoid | Open Or Shorted Condition Detected In Baro Read Solenoid Circuit. | ||||||||||||
| 62 | EMR Miles Not Stored | Unsuccessful Attempt To Update EMR Mileage In SBEC EEPROM (Trucks Only). | ||||||||||||
| 63 | EEPROM Write Denied | Unsuccessful Attempt To Write To An EEPROM Location By SBEC. | ||||||||||||
| N/A | Fault Code Error | DRB-II Does Not Recognize Fault Identification. | ||||||||||||
| 64 (2) | VNT Solenoid #1 CKT | Open or Shorted Condition Detected in VNT Solenoid No. 1 Circuit. | ||||||||||||
| 65 (2) | VNT Solenoid #2 Ckt | Open or Shorted Condition Detected in VNT Solenoid No. 2 Circuit. | ||||||||||||
| 67 (2) | VNT A-Side Control | MAP Reading Above Boost Goal for an Extended Time Period. | ||||||||||||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.