Power steering control module codes

How its codes differ

• C2217 is the module reporting its own internal fault. Chrysler bulletins update the module software for some models and allow the steering gear to be replaced for others.
• B2278 and similar torque sensor codes point to the sensor that tells the module how hard you are turning; Mazda lists the wiring, the sensor and the module as possible causes, and Ford's recall for the 2008 to 2011 Escape and Mariner updated the module software.
• U0131 is stored by other modules that lost contact with the steering module. Wiring, connectors, power, the high-current fuse or low battery voltage come before the module itself.
• Low battery voltage can reduce steering assist on its own, so a weak battery or charging fault is worth ruling out with any steering module code.

Codes

• B2278

  Steering shaft torque sensor fault (Ford, Mazda)

  Severity: Inspect soon

• C2217

  Electric power steering module internal fault (Chrysler, Dodge, Jeep, Ram)

  Severity: Inspect soon

• U0131

  Lost communication with the power steering control module

  Severity: Inspect soon

Signs it's failing

• Power steering or EPS warning light or message
• Heavy steering, especially at low speed or when parking
• Steering assist that cuts out and returns after a restart
• U0131 stored in other modules

How to test it

1. Steering is safety-critical. If the power steering warning is on or steering is heavy, stop somewhere safe, restart the engine, and if the warning stays on have the vehicle checked before driving further. (Low risk)

2. Read codes in all modules with a scan tool and have the battery and charging system tested. (Low risk)

3. Ask a dealer whether your VIN has an open recall, software update or bulletin for the steering code. (Low risk)

4. Steering module diagnosis, software updates, replacement and the steering angle calibration that follows are jobs for a qualified shop. (Best left to a shop)

   Warning: Faults in the steering system can cause loss of steering assist and a crash. A replacement module or gear has to be programmed, and the steering angle sensor centred; an uncentred sensor can limit steering assist.

After the repair

• Confirm the shop completed programming and steering angle sensor centring after a module, gear or column replacement.
• Check that the steering warning is off and steering effort is even from lock to lock before normal driving.