OBD Guide
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P1E4B

Control Module Redundant Drive Motor 2 Speed Sensing Circuit

P1E4B is an OBD-II diagnostic trouble code meaning: Control Module Redundant Drive Motor 2 Speed Sensing Circuit. Common causes: backup engine 2 fault, open or short circuit in the circuit. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check engine light comes on
  • Possible limitations in the operation of systems
  • Decreased performance
  • Unusual noises from the engine compartment
  • Switching to emergency mode

Causes

  • Backup engine 2 fault
  • Open or short circuit in the circuit
  • Connector problems
  • Engine speed sensor malfunction
  • Control module software error

How to Fix

  1. Check the integrity of the engine wiring harness 2
  2. Test motor and circuit resistance
  3. Check connector connections for corrosion and damage
  4. Scan the control module for additional errors
  5. Replace motor or wiring if necessary

Related codes

P1E4AP1E49P1E4C

FAQ

What does the P1E4B code mean?

P1E4B is an OBD-II diagnostic trouble code that indicates: Control Module Redundant Drive Motor 2 Speed Sensing Circuit

What causes a P1E4B error code?

The most common causes of P1E4B include: Backup engine 2 fault; Open or short circuit in the circuit; Connector problems; Engine speed sensor malfunction.

How do I fix a P1E4B diagnostic trouble code?

To fix P1E4B: Check the integrity of the engine wiring harness 2. Test motor and circuit resistance. Check connector connections for corrosion and damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1E4B?

Limited driving only, diagnose soon

How much does it cost to fix P1E4B?

The estimated repair cost for P1E4B is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat