Subaru 1988 MPFI Fuel injected models DTC 33 – Vehicle speed sensor (VSS) or circuit
DTC 33 meaning on Subaru 1988 MPFI Fuel injected models
DTC 33 on Subaru 1988 MPFI Fuel injected models indicates a fault with the Vehicle Speed Sensor (VSS) or its circuit. The VSS is responsible for providing the vehicle’s speed information to the engine control module.
Subaru 1988 MPFI Fuel injected models DTC 33 symptoms
1. Inoperative speedometer.
2. Harsh shifting or erratic transmission behavior.
3. Engine stalling at low speeds.
4. Check Engine Light (CEL) illuminated on the dashboard.
Subaru 1988 MPFI Fuel injected models DTC 33 causes
1. Faulty Vehicle Speed Sensor (VSS).
2. Damaged wiring or connectors in the VSS circuit.
3. Corrosion or poor connections at the VSS terminals.
4. Issues with the VSS reluctor ring or gear.
Subaru 1988 MPFI Fuel injected models DTC 33 seriousness
The DTC 33 related to the Vehicle Speed Sensor is moderately serious. While it may not directly affect the drivability of the vehicle, it can lead to issues with transmission operation and overall vehicle performance. Ignoring this fault can result in further damage to the transmission system.
How to diagnose DTC 33 on Subaru 1988 MPFI Fuel injected models
1. Use a diagnostic scanner to retrieve the trouble codes stored in the engine control module.
2. Inspect the VSS wiring harness for any visible damage or corrosion.
3. Check the VSS connector for proper connection and signs of wear.
4. Test the VSS using a multimeter to ensure it is functioning within specifications.
5. Inspect the VSS reluctor ring or gear for any damage or missing teeth.
How to fix DTC 33 on Subaru 1988 MPFI Fuel injected models
1. Replace the faulty Vehicle Speed Sensor (VSS) with a new unit.
2. Repair or replace any damaged wiring in the VSS circuit.
3. Clean the VSS connector and ensure a secure connection.
4. Replace the VSS reluctor ring or gear if necessary.
5. Clear the trouble codes using a diagnostic scanner after completing the repairs.
How to erase DTC 33 on Subaru 1988 MPFI Fuel injected models
To erase DTC 33 on Subaru 1988 MPFI Fuel injected models, use a diagnostic scanner to clear the trouble codes stored in the engine control module. Once the repairs have been made to address the VSS or circuit issue, clearing the codes will reset the Check Engine Light and ensure the system recognizes the problem has been resolved.
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