What Does P062B Mean?
The PCM has detected an internal performance issue with its fuel injector control circuitry. The module's internal driver that controls fuel injector pulse width or timing is not operating within calibrated parameters. This is an internal ECM/PCM fault rather than an external wiring or injector issue.
Safety Warning
May cause misfires, rough running, or complete loss of fuel injection. Vehicle may stall without warning. Have towed to a shop if running poorly.
Common Causes
40%
Internal PCM/ECM fuel injector driver circuit degradation
25%
PCM software corruption or calibration error
20%
Poor PCM power supply or ground causing internal processing errors
15%
Overloaded injector circuit causing PCM driver stress
Diagnostic Steps
1
Step 1: Check for any TSBs or software updates related to the PCM/ECM for this vehicle — reflash if an update is available.
2
Step 2: Verify PCM power and ground circuits — measure voltage at the PCM B+ pins (should be within 0.5V of battery) and ground pins (less than 0.1V drop to chassis).
3
Step 3: Measure each fuel injector's resistance — should typically be 11-17 ohms (high impedance) or 2-5 ohms (low impedance). An out-of-range injector can stress the driver.
4
Step 4: Check for shorts in the injector wiring harness by measuring each injector wire to ground with the connectors disconnected — should read OL (infinite).
5
Step 5: If power, grounds, and injectors all test normal, the PCM internal injector driver has failed and the PCM requires replacement and reprogramming.
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM has detected an internal performance issue with its fuel injector control circuitry. The module's internal driver that controls fuel injector pulse width or timing is not operating within calibrated parameters. This is an internal ECM/PCM fault rather than an external wiring or injector issu...
The most common cause of P062B (Internal Control Module Fuel Injector Control Performance) is: Internal PCM/ECM fuel injector driver circuit degradation
Typical repair costs for P062B range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause misfires, rough running, or complete loss of fuel injection. Vehicle may stall without warning. Have towed to a shop if running poorly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P062B to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Control Module
Difficulty
Type
Generic (SAE)
Recommended Tools
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