What Does P2141 Mean?
The PCM detects abnormally low voltage in the EGR throttle control circuit A. This indicates a short to ground, wiring issue, or component failure in the primary EGR control circuit.
Common Causes
35%
Short to ground in EGR valve control wiring
28%
Failed EGR position sensor with internal short circuit
22%
Faulty EGR valve actuator or solenoid coil
10%
Corroded connector pins causing voltage loss
5%
PCM driver circuit failure
Diagnostic Steps
1
Step 1: Measure voltage at EGR position sensor connector with key on engine off
2
Step 2: Inspect all EGR wiring for damage, chafing, or routing near hot components
3
Step 3: Disconnect EGR valve and test position sensor resistance per specifications
4
Step 4: Check for shorts to ground on signal and control wires with components disconnected
5
Step 5: Test reference voltage supply from PCM to EGR system
Estimated Repair Cost
$120 - $550
Parts + labor, varies by vehicle and location
The PCM detects abnormally low voltage in the EGR throttle control circuit A. This indicates a short to ground, wiring issue, or component failure in the primary EGR control circuit.
The most common cause of P2141 (Exhaust Gas Recirculation Throttle Control Circuit "A" Low) is: Short to ground in EGR valve control wiring
Typical repair costs for P2141 range from $120 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may experience rough idle or performance issues. Increased emissions and potential for engine knock under load conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2141 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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