EGR Throttle Control Circuit Low Voltage
The P2141 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the Exhaust Gas Recirculation (EGR) throttle control circuit. This circuit controls the EGR throttle actuator, which regulates exhaust gas flow into the intake manifold. A low voltage reading suggests a short to ground, open circuit, or faulty actuator, potentially affecting engine performance and emissions.
01. Most Common Causes
- Short to ground in EGR throttle control circuit
- Open circuit in EGR throttle control circuit
- Faulty EGR throttle actuator
- Corroded or damaged wiring/connectors
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Rough idle or stalling
- Increased emissions
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect EGR throttle actuator wiring and connectors for damage or corrosion.
Step 3: Test circuit voltage at the actuator connector using a multimeter (compare to manufacturer specs).
Step 4: Check for continuity and shorts to ground in the control circuit.
Step 5: If circuit is okay, test the EGR throttle actuator resistance and operation; replace if faulty.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced engine performance and increased emissions. You may experience stalling or hesitation, which could be unsafe.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause. Replacing the EGR throttle actuator may cost more.