OBD Guide
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P1551

Battery Current Sensor Circuit Low Input

P1551 is an OBD-II diagnostic trouble code meaning: Battery Current Sensor Circuit Low Input. Common causes: battery current sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Incorrect voltage readings on the dashboard
  • Battery charging problems
  • Reduced electrical system performance
  • Random electronic malfunctions

Causes

  • Battery current sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor connection or corrosion of sensor contacts
  • Wiring Harness Problems
  • Engine ECU malfunction

How to Fix

  1. Check the integrity of the wiring to the sensor
  2. Clean the sensor contacts from corrosion
  3. Check sensor resistance
  4. Scan sensor operating parameters
  5. Replace battery current sensor if necessary

Related codes

P1550P1552P0562

Error P1551 by Vehicle Brand

BMWVolkswagen

FAQ

What does the P1551 code mean?

P1551 is an OBD-II diagnostic trouble code that indicates: Battery Current Sensor Circuit Low Input

What causes a P1551 error code?

The most common causes of P1551 include: Battery current sensor malfunction; Open or short circuit in the sensor circuit; Poor connection or corrosion of sensor contacts; Wiring Harness Problems.

How do I fix a P1551 diagnostic trouble code?

To fix P1551: Check the integrity of the wiring to the sensor. Clean the sensor contacts from corrosion. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1551?

Yes, but get it checked soon

How much does it cost to fix P1551?

The estimated repair cost for P1551 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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