P0948 | P0948 Hydraulic Pump Relay Circuit High | code p0948 | p0948 obd2 | dtc p0948
Автор: IG Garage
Загружено: 2026-01-22
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P0948 | P0948 Hydraulic Pump Relay Circuit High | code p0948 | p0948 obd2 | dtc p0948
Hello friends welcome to the ig garage channel today I am telling you how to fix P0948 Hydraulic Pump Relay Circuit High so watch this video and learn how to fix it friends if you like this video then subscribe to the ig garage channel for more videos.
In this video, we explain OBD-II Trouble Code P0948, which stands for “Hydraulic Pump Relay Circuit High.”
This code is triggered when the TCM or PCM detects a higher-than-expected voltage signal in the hydraulic pump relay control circuit, causing abnormal pump operation or continuous pump activation.
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🔍 Common Symptoms of P0948:
Check Engine Light or Transmission Warning Light ON
Harsh or erratic gear shifts
Transmission overheating
Hydraulic pump running continuously
Vehicle may enter limp mode
Reduced acceleration
Poor fuel economy
⚙️ Possible Causes of P0948:
Faulty hydraulic pump relay
Short to power in relay control circuit
Stuck relay contacts
Damaged or melted wiring
Incorrect battery voltage or charging system issue
Faulty hydraulic pump
Defective TCM or PCM (rare)
🧰 How to Fix P0948:
Check battery voltage and charging system
Inspect hydraulic pump relay for sticking or failure
Test relay control circuit for short to power
Inspect wiring harness for damage
Replace faulty hydraulic pump relay
Repair or replace damaged wiring
Clear the code and perform a road test
📍 Hydraulic Pump Relay Location:
The hydraulic pump relay is usually located:
Inside the engine bay fuse/relay box, or
In the transmission control relay panel
Exact location depends on the vehicle make and model.
💰 Estimated Repair Cost:
Battery / Charging System Repair: $100 – $400
Hydraulic Pump Relay Replacement: $50 – $150
Wiring Repair: $100 – $300
Hydraulic Pump Replacement (if required): $400 – $1,500
TCM/PCM Replacement (rare): $300 – $1,500
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🚗 Summary:
DTC P0948 indicates a high-voltage condition in the hydraulic pump relay circuit, which can lead to excessive pump operation and transmission overheating.
Timely diagnosis prevents serious hydraulic and transmission damage.
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