OBD Guide
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P16E2

Battery Monitor Module Read Only Memory

P16E2 is an OBD-II diagnostic trouble code meaning: Battery Monitor Module Read Only Memory. Common causes: internal failure of the battery monitoring module, module power problems. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems with the start-stop system
  • Incorrect battery status readings
  • Reduced generator efficiency
  • Errors in other energy systems

Causes

  • Internal failure of the battery monitoring module
  • Module power problems
  • Open or short circuit in the communication circuit
  • Contact corrosion
  • Module software failure

How to Fix

  1. Check the power and ground of the monitoring module
  2. Check the integrity of the wiring harness to the module
  3. Scan the module for additional errors
  4. Try to reflash the module (if possible)
  5. Replace the battery monitoring module

Related codes

P16E0P16E1P16E3

FAQ

What does the P16E2 code mean?

P16E2 is an OBD-II diagnostic trouble code that indicates: Battery Monitor Module Read Only Memory

What causes a P16E2 error code?

The most common causes of P16E2 include: Internal failure of the battery monitoring module; Module power problems; Open or short circuit in the communication circuit; Contact corrosion.

How do I fix a P16E2 diagnostic trouble code?

To fix P16E2: Check the power and ground of the monitoring module. Check the integrity of the wiring harness to the module. Scan the module for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16E2?

Yes, but get it checked soon

How much does it cost to fix P16E2?

The estimated repair cost for P16E2 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat