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Home / DTC / P213C — EGR Throttle Control Circuit B Low

P213C — EGR Throttle Control Circuit B Low

Detailed page for trouble code P213C.

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Code

P213C

Generic P — Powertrain

EGR Throttle Control Circuit B Low

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on EGR throttle control circuit B (short to ground)
  • Corroded, bent or disconnected connector pins at the EGR throttle actuator
  • Faulty EGR throttle actuator (motor or internal sensor)
  • Failed PCM/ECM driver output for the EGR throttle (internal short or fault)
  • Blown fuse or bad relay supplying throttle/EGR actuator power
  • Water intrusion or contamination at connector

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine performance or limp-home mode
  • Erratic idle, surging or stalling
  • Increased emissions or failed emissions test
  • EGR system inoperative (possible drivability complaints)

What to check

  • Read and record freeze-frame and live-data from the PCM; note related codes
  • Visual inspection of wiring and connectors at the EGR throttle actuator for damage, corrosion, or moisture
  • Check fuses and relays that supply the throttle/EGR actuator power
  • Backprobe the EGR throttle connector and monitor circuit B voltage with ignition ON and engine running
  • Wiggle harness and connector while monitoring signal to look for intermittent faults
  • Measure resistance between the actuator pin and vehicle ground to check for short to ground

Signal parameters

  • Position sensor/reference signals typically 0.5–4.5 V depending on position (varies by design) — consult factory spec
  • Control driver outputs may be PWM or switched supply; expected high-level may be near battery voltage (9–13 V) when driven and low near 0–1 V when low
  • Actuator coil/motor resistance typically low (a few ohms to a few dozen ohms) — consult service manual
  • Any steady circuit B voltage near 0 V with key ON (instead of expected idle/reference voltage) indicates a low/short condition

Diagnostic algorithm

  1. Scan for codes and record freeze-frame/live-data. Note other related DTCs that may help (throttle, EGR, power/ground).
  2. Perform a careful visual inspection of the EGR throttle harness and connector for damage, corrosion, heat damage, or water ingress. Repair any obvious damage.
  3. Check relevant fuses/relays for the throttle/EGR circuit; replace if blown and retest.
  4. Backprobe the EGR throttle connector: with key ON measure reference and circuit B voltages. Compare to expected ranges and look for stuck-at-low or intermittent behavior.
  5. With connector attached, wiggle the harness while observing signal; note if code is intermittent.
  6. Disconnect the actuator and measure resistance between circuit B and ground/power to detect short to ground or short to battery. Repair wiring shorts as required.
  7. If wiring checks pass, bench-test or swap in known-good EGR throttle actuator (if available) and re-test to confirm actuator failure.
  8. If actuator replacement does not clear the fault and wiring is good, check PCM driver outputs and grounds. Replace PCM only after confirming driver fault with proper test equipment and manufacturer procedures.
  9. After repairs, clear codes and perform road/test cycles or prescribed self-test to confirm repair. Re-scan for stored/pendant codes.

Likely causes

  • Damaged/shorted harness or connector to the EGR throttle actuator
  • Defective EGR throttle actuator (motor or position sensor on circuit B)
  • Corroded connector or poor pin contact causing low voltage
  • Faulty PCM output driver (less common)

Fault status

⚠️ Status
EGR Throttle Control Circuit B Low — PCM detected circuit B voltage below expected threshold; diagnostic trouble code stored and MIL may be illuminated.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

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Code

P213C

LAND ROVER P — Powertrain

Throttle Control of Exhaust Gas Recirculation - Circuit B low

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on EGR throttle control circuit B (short to ground)
  • Corroded, bent or disconnected connector pins at the EGR throttle actuator
  • Faulty EGR throttle actuator (motor or internal sensor)
  • Failed PCM/ECM driver output for the EGR throttle (internal short or fault)
  • Blown fuse or bad relay supplying throttle/EGR actuator power
  • Water intrusion or contamination at connector

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine performance or limp-home mode
  • Erratic idle, surging or stalling
  • Increased emissions or failed emissions test
  • EGR system inoperative (possible drivability complaints)

What to check

  • Read and record freeze-frame and live-data from the PCM; note related codes
  • Visual inspection of wiring and connectors at the EGR throttle actuator for damage, corrosion, or moisture
  • Check fuses and relays that supply the throttle/EGR actuator power
  • Backprobe the EGR throttle connector and monitor circuit B voltage with ignition ON and engine running
  • Wiggle harness and connector while monitoring signal to look for intermittent faults
  • Measure resistance between the actuator pin and vehicle ground to check for short to ground

Signal parameters

  • Position sensor/reference signals typically 0.5–4.5 V depending on position (varies by design) — consult factory spec
  • Control driver outputs may be PWM or switched supply; expected high-level may be near battery voltage (9–13 V) when driven and low near 0–1 V when low
  • Actuator coil/motor resistance typically low (a few ohms to a few dozen ohms) — consult service manual
  • Any steady circuit B voltage near 0 V with key ON (instead of expected idle/reference voltage) indicates a low/short condition

Diagnostic algorithm

  1. Scan for codes and record freeze-frame/live-data. Note other related DTCs that may help (throttle, EGR, power/ground).
  2. Perform a careful visual inspection of the EGR throttle harness and connector for damage, corrosion, heat damage, or water ingress. Repair any obvious damage.
  3. Check relevant fuses/relays for the throttle/EGR circuit; replace if blown and retest.
  4. Backprobe the EGR throttle connector: with key ON measure reference and circuit B voltages. Compare to expected ranges and look for stuck-at-low or intermittent behavior.
  5. With connector attached, wiggle the harness while observing signal; note if code is intermittent.
  6. Disconnect the actuator and measure resistance between circuit B and ground/power to detect short to ground or short to battery. Repair wiring shorts as required.
  7. If wiring checks pass, bench-test or swap in known-good EGR throttle actuator (if available) and re-test to confirm actuator failure.
  8. If actuator replacement does not clear the fault and wiring is good, check PCM driver outputs and grounds. Replace PCM only after confirming driver fault with proper test equipment and manufacturer procedures.
  9. After repairs, clear codes and perform road/test cycles or prescribed self-test to confirm repair. Re-scan for stored/pendant codes.

Likely causes

  • Damaged/shorted harness or connector to the EGR throttle actuator
  • Defective EGR throttle actuator (motor or position sensor on circuit B)
  • Corroded connector or poor pin contact causing low voltage
  • Faulty PCM output driver (less common)

Fault status

⚠️ Status
EGR Throttle Control Circuit B Low — PCM detected circuit B voltage below expected threshold; diagnostic trouble code stored and MIL may be illuminated.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

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P2135 P2106 P2101 P2138 P0401
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