What Does P210C Mean?
The PCM has detected an abnormally low voltage or current in the secondary throttle actuator motor control circuit. This indicates a short to ground or excessive resistance in the circuit.
Safety Warning
Vehicle will likely enter limp mode with severely limited power. May experience sudden throttle cutoff creating hazardous conditions in traffic or highway speeds.
Common Causes
35%
Short to ground in throttle actuator motor wiring
30%
Internal short in throttle actuator motor windings
20%
Damaged or shorted throttle body connector
15%
PCM internal short or driver circuit failure
Diagnostic Steps
1
Step 1: Disconnect throttle body connector and check for short to ground on motor control circuits using multimeter
2
Step 2: Measure resistance of throttle actuator motor between terminals and to ground (should be open to ground)
3
Step 3: Inspect wiring harness for pinched, chafed, or damaged wires near hot or sharp components
4
Step 4: Check for moisture or corrosion inside throttle body connector that could cause shorting
5
Step 5: If circuits test normal, substitute known-good PCM or test PCM driver circuits
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally low voltage or current in the secondary throttle actuator motor control circuit. This indicates a short to ground or excessive resistance in the circuit.
The most common cause of P210C (Throttle Actuator "B" Control Motor Circuit Low) is: Short to ground in throttle actuator motor wiring
Typical repair costs for P210C range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will likely enter limp mode with severely limited power. May experience sudden throttle cutoff creating hazardous conditions in traffic or highway speeds.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P210C to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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