OBD Guide
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P1A84

Starter/Generator Control Module Coolant Level Sensor 3 High Voltage

P1A84 is an OBD-II diagnostic trouble code meaning: Starter/Generator Control Module Coolant Level Sensor 3 High Voltage. Common causes: coolant level 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 coolant level readings
  • Engine overheating
  • Reduced engine performance
  • Problems starting the engine

Causes

  • Coolant level sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Starter/Generator Control Module Malfunction
  • Circuit Grounding Problems

How to Fix

  1. Check the continuity of the coolant level sensor circuit
  2. Check sensor connectors and connections
  3. Check the functionality of the coolant level sensor
  4. Check Starter/Generator Control Module
  5. Replace faulty components

Related codes

P1A85P1A86P1A87

FAQ

What does the P1A84 code mean?

P1A84 is an OBD-II diagnostic trouble code that indicates: Starter/Generator Control Module Coolant Level Sensor 3 High Voltage

What causes a P1A84 error code?

The most common causes of P1A84 include: Coolant level sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Starter/Generator Control Module Malfunction.

How do I fix a P1A84 diagnostic trouble code?

To fix P1A84: Check the continuity of the coolant level sensor circuit. Check sensor connectors and connections. Check the functionality of the coolant level sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1A84?

Yes, but get it checked soon

How much does it cost to fix P1A84?

The estimated repair cost for P1A84 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat