P0948 | P0948 Hydraulic Pump Relay Circuit High | code p0948 | p0948 obd2 | dtc p0948

Описание: 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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