Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B151E1D — Electric AC Compressor High Voltage Supply. Circuit Current Out of Range

B151E1D — Electric AC Compressor High Voltage Supply. Circuit Current Out of Range

Detailed page for trouble code B151E1D.

34,421codes
59brands
11,925generic
22,496specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B151E1D

VOLVO B — Body

Electric AC Compressor High Voltage Supply. Circuit Current Out of Range

Brand: VOLVO
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or corroded high‑voltage wiring or connectors to the A/C compressor
  • Blown or open high‑voltage fuse, fuse link or contactor
  • Faulty A/C compressor electric motor (internal short or excessive load)
  • Compressor drive/inverter module failure or control electronics fault
  • Poor or missing ground/return in the HV circuit
  • HV bus voltage outside specification (battery/inverter issue)

Symptoms

  • A/C compressor does not engage or cycles unexpectedly
  • Reduced or no cabin cooling with AC request
  • Malfunction indicator lamp or HVAC warning message displayed
  • Other HV system warnings or limited-power/limp mode conditions
  • Unusual noises from compressor area or smell of overheating
  • Stored DTC(s) related to high-voltage, compressor or CAN communications

What to check

  • Read and record all stored DTCs and freeze‑frame data from HVAC, PCC/BCM and HV battery modules
  • Visually inspect HV connectors, wiring harness, fuses and contactors for damage, melting, corrosion, or loose pins
  • Verify for additional HV/traction warnings that could affect compressor supply
  • Check low‑voltage supply and ground to the compressor control/inverter (where applicable)
  • Check for continuity and resistance of HV fuse/link and contactor coil circuits (vehicle off, HV isolated)
  • Confirm compressor request/command from HVAC control module via CAN or low‑voltage signal

Signal parameters

  • HV bus DC voltage (Vdc) at compressor supply during request
  • Compressor supply current (A) measured during compressor run request
  • Resistance (ohms) of compressor motor windings and insulation resistance to ground (MΩ) with HV isolated
  • Voltage/command on low‑voltage control line or PWM to compressor inverter (V/Hz)
  • HV contactor/contactor coil voltage and state (open/closed)
  • CAN messages/diagnostic parameters from HVAC module and HV battery/inverter (request/acknowledge statuses)

Diagnostic algorithm

  1. Important: High‑voltage work is hazardous. Follow manufacturer safety procedures, isolate HV system, and use appropriate PPE. If not qualified, do not perform HV tests.
  2. Capture all DTCs and freeze‑frame data from HVAC, HV battery and power electronics modules. Note conditions (engine/off, A/C on, vehicle speed, temperatures).
  3. Visual inspection: Inspect HV connector at compressor, harness routing, strain reliefs, and look for heat/cable damage, corrosion or water ingress. Check HV fuse links/contactor for signs of arcing or overheating.
  4. Verify low‑voltage control: With vehicle 12V system active, confirm HVAC/compressor request messages and controller outputs (low‑voltage control/PWM) using a scanner or oscilloscope.
  5. Check fuses/relays/contactors: Confirm continuity of HV fuses and operation of contactor/relay when compressor is requested. Replace faulty components as necessary.
  6. Insulation and motor checks (HV isolated): With high‑voltage system de‑energized and isolated per safety procedures, measure compressor motor winding resistance and perform insulation resistance test to chassis. Compare to spec.
  7. Current/voltage measurement (qualified tech only): Re‑energize HV system with appropriate safety measures and measure supply voltage and current to the compressor during a commanded run. Look for excessive inrush or sustained over‑current.
  8. If current is excessive and motor windings/insulation fail specs, suspect internal compressor motor fault — repair/replace compressor assembly.
  9. If motor and harness are OK but current measurement or control signals are abnormal, investigate or replace the compressor inverter/drive module, HV contactor or HV current sensor wiring.
  10. After repairs, clear DTCs, perform functional test and road/operational test. Re-scan all related modules to confirm no additional faults.
  11. If intermittent or not reproducible, monitor CAN and HV parameters during varied operating conditions and consider replacing connectors/harness sections showing marginal contact.

Likely causes

  • Damaged HV wiring or connector corrosion at compressor plug
  • Faulty compressor motor drawing excessive current or partially shorted windings
  • Defective compressor inverter/drive or HV contactor (relay)
  • Faulty HV current sensor or its wiring
  • Blown HV fuse or poor contact at fuse/contactor

Fault status

⚠️ Status
Electric A/C compressor high‑voltage supply: circuit current out of expected range (open, short or excessive draw). Check HV supply, harness, fuse/contactor, compressor motor and inverter.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 2.0 - 5.0 hours

Similar codes

B1510 B1511 B1512 P0A7B P0A7F
Repair manuals

Manual library for VOLVO

221

Browse 221 VOLVO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

VOLVO

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .