Powertrain, generic (extended)

P213C EGR Throttle Control Circuit B Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P213C points to a low signal in the drive circuit of EGR throttle B: the output stage sees too little voltage where it expects supply potential, which almost always means a conductor of the flap motor is touching ground. Chafed harness sections near the exhaust, water in the connector or a motor winding shorted to its housing are typical. Depending on the bridge design the module either switches the output off or the motor stays partly energised. No manufacturer documents this code publicly, so no threshold or debounce time can be given; CARB demands separate detection of circuit faults on output components. For throttle A the matching short-circuit code is P2141. An open circuit on B is P213A, a function fault P213B. The flap usually falls back to its rest position and EGR is limited.

Likely causes

Chafed wire shorting to ground between module and flap
Water or corrosion in the flap connector
Actuator motor winding shorted to housing
Faulty output stage in the engine control module

Symptoms

  • Check engine lamp on
  • Reduced power or limp mode
  • Engine shudder when switched off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

egr throttle b

Related codes

P213AP213BP213DP2141

References: law.cornell.edu, ms-motorservice.com.