What Does B1367 Mean?
B1367 indicates the Body Control Module (BCM) or instrument cluster has detected a fault in the tachometer circuit that receives engine RPM signals from the ignition system. This code typically means the BCM is not receiving a proper tachometer signal from the engine control module, ignition coil, or tach signal wire. The fault prevents accurate engine speed display and may affect systems that rely on RPM data for proper operation.
Common Causes
40%
Faulty or corroded wiring/connectors in the tachometer signal circuit between ECM and instrument cluster
30%
Failed instrument cluster or tachometer gauge internal circuit board
20%
Faulty Body Control Module not properly receiving or processing tach signal
10%
Engine Control Module not sending proper tach signal output or internal ECM fault
Diagnostic Steps
1
Step 1: Perform visual inspection of instrument cluster connectors and tachometer signal wiring harness for corrosion, damaged pins, loose connections, or chafed wires. Check BCM connectors for similar issues.
2
Step 2: Using a digital multimeter, backprobe the tach signal wire at the instrument cluster connector with engine running to verify presence of pulsing voltage signal (typically 0-5V or 0-12V square wave depending on manufacturer). Compare readings to service manual specifications.
3
Step 3: If signal is absent at cluster, trace tach signal wire back to BCM and ECM, testing continuity with engine off and checking for shorts to ground or power. Verify BCM is receiving tach signal input from ECM.
4
Step 4: If wiring and signals test correctly, use scan tool to monitor live ECM RPM data and compare to BCM/cluster RPM data. If ECM shows correct RPM but cluster does not, suspect instrument cluster failure. If both show incorrect data, suspect ECM output fault.
5
Step 5: Clear codes and perform functional test with engine running at various RPM ranges (idle, 2000 RPM, 3000 RPM) while monitoring tach operation and scan tool data to confirm repair and verify code does not return.
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
B1367 indicates the Body Control Module (BCM) or instrument cluster has detected a fault in the tachometer circuit that receives engine RPM signals from the ignition system. This code typically means the BCM is not receiving a proper tachometer signal from the engine control module, ignition coil, o...
The most common cause of B1367 (Ignition Tach Circuit Failure) is: Faulty or corroded wiring/connectors in the tachometer signal circuit between ECM and instrument cluster
Typical repair costs for B1367 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle safety or drivability directly, though an inoperative tachometer can make it difficult to monitor engine RPM for proper shifting and operation. The vehicle is safe to drive but repair should be completed at convenience to restore full instrument functionality.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1367 to identify the root cause.
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Quick Info
Category
Body
System
Body Control / Instrument Cluster
Difficulty
Type
Manufacturer
Recommended Tools
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