What this code means
B1080 may indicate that the relay control module is seeing a mismatch between an IG1 ignition input and the IG1 status information coming from the body control module over the body
What the vehicle may do
- The vehicle may store the code during ignition-on operation.
- Some vehicles may show ignition-state, module wake-up, or body-network related symptoms.
- The code can appear with other body-network concerns.
Possible fault areas
- Possible IG1_METER circuit issue.
- Possible power supply side issue.
- Possible connector or terminal concern.
- Possible body control module related fault area.
Diagnostic path
Code overview
On this 2020 to 2025 Honda CR-V Hybrid, B1080 is an ignition signal plausibility code in the relay control module and body control module area. In plain terms, the relay control module may be seeing a mismatch between the hardwired IG1 input and the IG1 status being reported over the body network. The vehicle may store the code during key-on operation, and depending on the fault, you may see ignition-state or module wake-up related symptoms. The broad fault areas can include the IG1_METER circuit, power supply side faults, connector or terminal issues, or a possible body control module problem. Before chasing this code, start with the basic system checks. If other body-network codes are present, deal with that network diagnosis first so you do not mistake a communication or shared-power problem for a single-circuit failure.
Recreate the monitor conditions
To run the check for B1080, turn the vehicle to the ON mode. Then wait for at least 6 seconds. That gives the module time to compare the IG1 input against the IG1 status it is seeing from the body control module.
Check the IG1_METER circuit
With IG Mode ON, perform the IG1_METER circuit inspection at body control module connector A, the 66P female connector. The normal result for that inspection is 12 V battery voltage. Make sure the terminal identification is clear before probing; if the connector view or circuit table is not clear, pause and do not guess at the terminals.
Use the result to choose the next path
If the IG1_METER circuit inspection is abnormal, treat it as a circuit problem and continue isolating the fault in that circuit. If the power supply side of the inspection is abnormal, continue with the additional power supply inspection to locate the failure. If the inspection is normal, this diagnostic path points to a problem with the body control module. Do not jump straight to a part; let the circuit and power supply results drive the decision.
Takeaway
The key to B1080 is to prove whether the relay control module’s IG1 information disagrees because the IG1_METER circuit or power supply is wrong, or because the body control module side is the remaining suspect after the circuit checks normal. For more diagnostic training, visit stepdiagnostics.com.
Final check
B1080 is often approached as a plausibility check between a hardwired ignition signal and body control module network information.
For more guided automotive diagnostics, visit STEP Diagnostics.
