What Does P2061 Mean?
The powertrain control module has detected an abnormally high voltage signal in the air pump control circuit that delivers compressed air for reductant injection in diesel exhaust aftertreatment systems. This indicates a short to power or internal control module fault.
Common Causes
35%
Shorted wiring harness or connector pins creating high voltage condition
30%
Failed air pump relay stuck closed or internally shorted
20%
Defective reductant injection air pump with internal electrical fault
10%
PCM or control module internal driver circuit failure
5%
Water intrusion or corrosion causing high resistance/short circuit
Diagnostic Steps
1
Step 1: Inspect air pump wiring harness and connectors for damage, corrosion, or signs of shorts to power
2
Step 2: Disconnect air pump connector and measure voltage at control circuit with key on; should read near 0V
3
Step 3: Test air pump relay operation and check for internal shorts using multimeter
4
Step 4: If wiring and relay check good, perform resistance test on air pump windings per specifications
5
Step 5: Monitor control circuit with oscilloscope during commanded operation to identify intermittent shorts
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The powertrain control module has detected an abnormally high voltage signal in the air pump control circuit that delivers compressed air for reductant injection in diesel exhaust aftertreatment systems. This indicates a short to power or internal control module fault.
The most common cause of P2061 (Reductant Injection Air Pump Control Circuit High) is: Shorted wiring harness or connector pins creating high voltage condition
Typical repair costs for P2061 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive short-term but emission system effectiveness is compromised. May enter reduced power mode or fail emissions testing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2061 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System (Diesel Aftertreatment)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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