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P2141 — Egr Throttle Control Circuit Low

Manufacturer-specificPowertrain (engine & transmission)

The P2141 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the circuit that controls the EGR (Exhaust Gas Recirculation) valve or throttle position sensor associated with EGR operation.

Symptoms

What causes it — most likely first

1. Faulty EGR valve (stuck open or closed)

A malfunctioning valve can create a voltage drop in the control circuit, triggering the low‑voltage fault.

2. Damaged or disconnected wiring/terminal in the EGR control circuit

Loose connections, frayed wires, or corrosion can cause insufficient voltage to the valve or sensor.

3. Defective throttle position sensor for EGR control

The sensor may provide a low signal or no signal to the ECM, resulting in the code.

4. Faulty EGR solenoid or actuator wiring

A short or open in the solenoid circuit can present a low‑voltage condition.

5. PCM/ECM software glitch

Rarely, a firmware issue can misread the circuit voltage; this is typically a last‑resort diagnosis.

How it's diagnosed

  1. Check for a visible fault in the EGR valve (inspect for clogging or improper operation).
  2. Inspect the wiring harness and connectors for the EGR control circuit for damage or corrosion.
  3. Use a scan tool to monitor the EGR valve or throttle position sensor signal while the engine is running.
  4. Test the voltage at the EGR valve connector with a multimeter to confirm the low‑voltage condition.
  5. If all hardware is functional, consider updating or re‑flashing the ECM software as a final step.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2139 — Throttlepedal Position Sensorswitch DfP2140 — Throttlepedal Position Sensorswitch EfP2142 — Egr Throttle Control Circuit HighP2143 — Egr Vent Control CircuitopenP2144 — Egr Vent Control Circuit LowP2145 — Egr Vent Control Circuit High

Frequently asked

Can I just replace the PCM to fix P2141?

Replacing the PCM is usually unnecessary for this code. The issue is almost always a hardware fault in the EGR valve, wiring, or sensor, not a computer failure.

Is a clogged EGR valve the most common cause?

Yes, a clogged or stuck EGR valve is the most frequent source of a low‑voltage fault in the EGR circuit.

Will fixing P2141 improve fuel economy?

Correcting the fault can restore proper EGR operation, which may reduce excess fuel consumption and improve overall efficiency.