P1591
Body Control Module Engine Speed Request Signal Message Counter Incorrect
P1591 is an OBD-II diagnostic trouble code meaning: Body Control Module Engine Speed Request Signal Message Counter Incorrect. Common causes: body control module (bcm) malfunction, wiring problems between bcm and ecu. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Unstable engine operation
- Problems with car electrical equipment
- Reduced engine power
- Errors in other systems
Causes
- Body Control Module (BCM) Malfunction
- Wiring problems between BCM and ECU
- Malfunction of the electronic engine control unit
- Problems with power supply or grounding of modules
- Software errors in modules
How to Fix
- Check wiring continuity between BCM and ECU
- Check power supply and grounding of modules
- Read all error codes and run diagnostics
- Flash or replace BCM if necessary
- Replace the ECU if a fault is detected
Related codes
Error P1591 by Vehicle Brand
FAQ
What does the P1591 code mean?
P1591 is an OBD-II diagnostic trouble code that indicates: Body Control Module Engine Speed Request Signal Message Counter Incorrect
What causes a P1591 error code?
The most common causes of P1591 include: Body Control Module (BCM) Malfunction; Wiring problems between BCM and ECU; Malfunction of the electronic engine control unit; Problems with power supply or grounding of modules.
How do I fix a P1591 diagnostic trouble code?
To fix P1591: Check wiring continuity between BCM and ECU. Check power supply and grounding of modules. Read all error codes and run diagnostics. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1591?
Yes, but get it checked soon
How much does it cost to fix P1591?
The estimated repair cost for P1591 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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