OBD Guide
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P1A86

Starter/Generator Control Module Coolant Level Sensor 4 High Voltage

P1A86 is an OBD-II diagnostic trouble code meaning: Starter/Generator Control Module Coolant Level Sensor 4 High Voltage. Common causes: coolant level sensor malfunction, short circuit in the sensor circuit. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Incorrect coolant level readings
  • Possible problems with the operation of the hybrid system
  • Reduced cooling system efficiency

Causes

  • Coolant level sensor malfunction
  • Short circuit in the sensor circuit
  • Wiring Harness Problems
  • Starter/Generator Control Module Malfunction
  • Contact corrosion

How to Fix

  1. Check the condition of the coolant level sensor
  2. Check the continuity and resistance of the sensor circuit
  3. Inspect the wiring harness for damage
  4. Check contacts for corrosion
  5. If necessary, replace the sensor or control module

Related codes

P1A85P1A87

FAQ

What does the P1A86 code mean?

P1A86 is an OBD-II diagnostic trouble code that indicates: Starter/Generator Control Module Coolant Level Sensor 4 High Voltage

What causes a P1A86 error code?

The most common causes of P1A86 include: Coolant level sensor malfunction; Short circuit in the sensor circuit; Wiring Harness Problems; Starter/Generator Control Module Malfunction.

How do I fix a P1A86 diagnostic trouble code?

To fix P1A86: Check the condition of the coolant level sensor. Check the continuity and resistance of the sensor circuit. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1A86?

Yes, but get it checked soon

How much does it cost to fix P1A86?

The estimated repair cost for P1A86 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat