What Does P210D Mean?
The PCM has detected abnormally high voltage or current in the secondary throttle actuator motor control circuit. This indicates a short to voltage or open ground in the circuit.
Safety Warning
Vehicle will enter limp mode with restricted throttle operation. May cause sudden power reduction or complete throttle failure, creating dangerous situations especially during merging or passing.
Common Causes
35%
Short to battery voltage in throttle actuator motor control wiring
30%
Open or high resistance in throttle actuator ground circuit
20%
Failed throttle actuator motor with internal open circuit
15%
PCM driver circuit failure or internal issue
Diagnostic Steps
1
Step 1: Disconnect throttle body connector and check for voltage on motor control circuits (should be 0V key on, engine off)
2
Step 2: Verify proper ground circuit continuity from throttle body to PCM and to chassis ground
3
Step 3: Inspect wiring harness for damage causing short to power, especially near battery or fuse box
4
Step 4: Check throttle actuator motor resistance; if open circuit (infinite resistance), motor has failed
5
Step 5: Monitor voltage signals at PCM connector during cranking to identify PCM driver issues
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage or current in the secondary throttle actuator motor control circuit. This indicates a short to voltage or open ground in the circuit.
The most common cause of P210D (Throttle Actuator "B" Control Motor Circuit High) is: Short to battery voltage in throttle actuator motor control wiring
Typical repair costs for P210D range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will enter limp mode with restricted throttle operation. May cause sudden power reduction or complete throttle failure, creating dangerous situations especially during merging or passing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P210D to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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