P2655 — A Rocker Arm Actuator Control Circuit/Open Bank 2
P2655 — A Rocker Arm Actuator Control Circuit/Open Bank 2. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit.
powertrain (engine/transmission)
Is it safe to drive?
Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P2655 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the a rocker arm actuator control circuit/open bank 2 for damage, corrosion, chafing or poor contact.
- Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
- Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2655 does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P2655 (parts and labor, USD, independent shop rates): Replace the faulty sensor or actuator: $150–$500; Repair wiring or connectors: $80–$250; Control module repair: $300–$1,000. Overall, fixing P2655 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
What is the most common cause of P2655?
The most common causes are: control module driver fault, blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit.
How much does it cost to fix P2655?
Replace the faulty sensor or actuator — $150–$500; Repair wiring or connectors — $80–$250; Control module repair — $300–$1,000. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
Will P2655 clear itself?
Sometimes P2655 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.
Is it safe to drive with P2655?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
What are the symptoms of P2655?
Drivers most often notice: Check Engine Light on, the affected system operates intermittently or not at all, increased fuel consumption in some cases, possible limp mode depending on the affected component.
What does P2655 mean?
When P2655 appears on a scan, it means the control module has flagged a problem in the sensor and actuator circuits: a rocker arm actuator control circuit/open bank 2. The fault sits in the powertrain (engine/transmission) group of the OBD2 standard.
“Bank 2” means the side of the engine opposite to cylinder 1. Verify which side that is on your specific engine before testing or replacing parts.
This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2655 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.
Common symptoms of P2655
- Check Engine Light on
- the affected system operates intermittently or not at all
- increased fuel consumption in some cases
- possible limp mode depending on the affected component
What causes P2655?
- corroded, loose or damaged connector
- faulty sensor or actuator of the affected circuit
- poor ground connection
- control module driver fault
How to diagnose P2655
- Connect an OBD2 scanner, confirm P2655 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the a rocker arm actuator control circuit/open bank 2 for damage, corrosion, chafing or poor contact.
- Measure reference voltage, ground and signal continuity at the component connector.
- Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2655 does not return.
How to fix P2655
Start with the cheapest and most common causes before replacing expensive parts:
- Replace the faulty sensor or actuator — $150–$500
- Repair wiring or connectors — $80–$250
- Control module repair — $300–$1,000
How much does it cost to fix P2655?
Repair cost depends on which component actually failed. Typical scenarios for P2655 (parts and labor, USD, independent shop rates):
- Replace the faulty sensor or actuator: $150–$500
- Repair wiring or connectors: $80–$250
- Control module repair: $300–$1,000
Overall, fixing P2655 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P2655?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.