Powertrain, generic (extended)

P2141 EGR Throttle Control Circuit A Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2141 flags a low signal in the drive circuit of EGR throttle A, the main diesel regulating flap that lowers intake pressure so exhaust gas can flow back. A wire of the flap motor touching ground, a winding shorted to the housing or a wet connector are the common reasons. Note how J2012 spreads flap A over two ranges: open circuit and range/performance sit at P0487 and P0488, low and high at P2141 and P2142; flap B uses P213A to P213D. P0489 sounds similar but concerns the EGR valve A drive, not the throttle. No manufacturer documents P2141 publicly, so no figures can be quoted; CARB requires circuit faults on output components to be reported. The module usually disables the flap, which then rests open, and EGR is reduced.

Likely causes

Chafed wire shorting to ground between module and flap
Moisture 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
  • Engine shudder when switched off
  • Reduced power or limp mode

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 a

Related codes

P2142P0487P0488P213C

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