What Does P212E Mean?
The PCM has detected an unstable or intermittent signal from Throttle Position Sensor G circuit. The signal voltage is fluctuating unexpectedly or dropping in and out of valid range.
Common Causes
40%
Loose or corroded connector at throttle body causing intermittent contact
30%
Intermittent open or short in wiring harness due to flexing or vibration
20%
Failing throttle body sensor with internal intermittent fault
7%
Poor ground connection with intermittent high resistance
3%
Intermittent PCM internal fault in input circuit
Diagnostic Steps
1
Step 1: Perform wiggle test on throttle body connector and wiring harness while monitoring sensor voltage in live data
2
Step 2: Inspect connector terminals for corrosion, spread pins, or moisture; clean and apply dielectric grease
3
Step 3: Check for rubbing or chafing of wiring harness against sharp edges, especially near throttle body and along frame rails
4
Step 4: Monitor TPS G voltage with engine running at various RPMs and throttle positions to identify when fault occurs
5
Step 5: If intermittent cannot be replicated but code recurs, replace throttle body assembly
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The PCM has detected an unstable or intermittent signal from Throttle Position Sensor G circuit. The signal voltage is fluctuating unexpectedly or dropping in and out of valid range.
The most common cause of P212E (Throttle Position Sensor/Switch "G" Circuit Intermittent) is: Loose or corroded connector at throttle body causing intermittent contact
Typical repair costs for P212E range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent faults can cause unpredictable throttle response or sudden limp mode activation. Creates hazardous driving conditions due to unpredictability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P212E to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control (ETC)
Difficulty
Type
Generic (SAE)
Recommended Tools
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