P1246 MERCURY – Alternator Load Input Failed

P1246 MERCURY Possible Causes

Faulty alternator/generator
Alternator/generator harness is open or shorted
Poor electrical connection in the alternator/generator circuit
Damaged Powertrain Control Module (PCM)

How is the P1246 MERCURY code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or maintenance engine warning light soon)

P1246 MERCURY Meaning

The Powertrain Control Module (PCM) monitors the generator load from the generator/regulator as a frequency. The frequency range is determined by the voltage regulator temperature where 97% represents full load, below 6% means no load.

P1246 SAAB – Intake Manifold Air Control Solenoid Inner Valve Circuit Open / Short to Ground

P1246 SAAB Possible Causes

Faulty intake manifold air control solenoid inner flap
Intake manifold air control solenoid inner flap harness is open or shorted
Poor electrical connection in the intake manifold air control solenoid inner flap circuit

How is SAAB P1246 Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or service engine soon warning light)

P1246 SAAB Meaning

Intake manifold air control solenoid inner flap circuit open / short to ground is the generic description for Saab P1246 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Saab P1246 OBDII code.

P1247 – Low turbo boost pressure

What does code P1247 mean?

This error code indicates that the boost pressure generated by the turbocharger is lower than expected. The pressure sensor (MAP) sends information to the engine control module (PCM), and if the measured pressure does not match what the system expects, then code P1247 is recorded.

This may indicate a problem with the turbo, boost pipes, or the sensor itself.

Possible symptoms:

Engine light on (Check Engine)
Loss of engine power, especially during acceleration
Engine running irregularly or lacking responsiveness

Possible causes:

MAP sensor hose damaged or disconnected
Leak in the intake system (manifold, boost pipe, etc.)
Turbo boost too low (clogged turbo, faulty regulator valve)
Faulty MAP sensor
Engine control module (PCM) faulty (less common)

How to fix code P1247?

Start with a visual inspection of the turbo hoses, intake pipes, and wiring around the MAP sensor.
Look for signs of air leaks or loose pipes.
Check if the MAP sensor is working properly, using a diagnostic tool.
Check the turbocharger performance: low boost may come from a stuck wastegate or clogging.
As a last resort, if all components are good, consider checking the PCM.

🔧 Tip: Low turbo pressure can lead to noticeable power loss and higher fuel consumption. It is best to have the system checked quickly to avoid damaging other components.

P1247 ACURA – Malfunction in Accelerator Pedal Position Sensor 2 Circuit

P1247 ACURA Possible Causes

Faulty Accelerator Pedal Position Sensor 2
Accelerator Pedal Position Sensor 2 harness is open or shorted
Poor electrical connection in Accelerator Pedal Position Sensor 2 circuit

How is the P1247 ACURA code repaired?

Possible Symptoms

Engine Light On (or Service Engine Soon Warning Light)

P1247 ACURA Meaning

Accelerator Pedal Position Sensor 2 Circuit Malfunction is the generic description for the Acura P1247 code, but the manufacturer may have a different description for your vehicle’s model and year. Currently, we do not have more information about the Acura P1247 OBDII code.

P1247 BUICK – Fuel Injector Control Circuit 8 Shorted

P1247 BUICK Possible Causes

Faulty fuel injector 8
Fuel injector 8 harness is open or shorted
Poor electrical connection in fuel injector 8 circuit
Faulty Engine Control Module (ECM)

How is the P1247 BUICK code repaired?

Possible Symptoms

Engine light on (or service engine soon warning light)

P1247 BUICK Meaning

The Engine Control Module (ECM) provides voltage to each fuel injector on the positive voltage injector control circuits. The ECM powers each fuel injector by grounding the control circuit for that fuel injector. The ECM monitors the status of the positive voltage injector control circuits and fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the related fuel injector group. The Diagnostic Trouble Code (DTC) will be set when the ECM injector output driver detects incorrect current on a fuel injector circuit.

P1247 CADILLAC – Fuel Injector 8 Control Circuit Short

P1247 CADILLAC Possible Causes

Faulty fuel injector 8
Fuel injector 8 harness is open or shorted
Poor electrical connection in fuel injector 8 circuit
Faulty Engine Control Module (ECM)

How is the P1247 CADILLAC code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine Light On (or Service Engine Soon Warning Light)

P1247 CADILLAC Meaning

The Engine Control Module (ECM) provides voltage to each fuel injector on the injector positive voltage control circuits. The ECM powers each fuel injector by grounding the control circuit for that fuel injector. The ECM monitors the status of the injector positive voltage control circuits and fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the related fuel injector group. The Diagnostic Trouble Code (DTC) will be set when the ECM injector output driver detects incorrect current on a fuel injector circuit.

P1247 CHEVROLET – Fuel Injector 8 Control Circuit Short

P1247 CHEVROLET Possible Causes

Faulty fuel injector 8
Fuel injector 8 harness is open or shorted
Poor electrical connection in fuel injector 8 circuit
Faulty Engine Control Module (ECM)

How is the P1247 CHEVROLET code repaired?

Possible Symptoms

Engine light on (or service engine soon warning light)

P1247 CHEVROLET Meaning

The Engine Control Module (ECM) provides voltage to each fuel injector on the injector positive voltage control circuits. The ECM powers each fuel injector by grounding that fuel injector’s control circuit. The ECM monitors the status of the injector positive voltage control circuits and fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the related fuel injector group. The Diagnostic Trouble Code (DTC) will be set when the ECM injector output driver detects incorrect current on a fuel injector circuit.

P1247 FORD – Low Turbo Boost Pressure

P1247 FORD Possible Causes

Damaged MAP hose
Low turbo boost
Intake manifold or crossover tube leaks
Faulty MAP sensor
Faulty Powertrain Control Module (PCM)

How is the P1247 FORD code repaired?

Possible Symptoms

Engine light on (or maintenance engine warning light soon)

P1247 FORD Meaning

The boost pressure sensor responds to changes in pressure in the intake manifold. This pressure is created by the turbocharger and changes with the accelerator pedal position (APP) and engine speed. The Powertrain Control Module (PCM) uses this information to assist in diagnosing the barometric pressure sensor (BARO) and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The PCM supplies 5 volts to the boost pressure sensor on the 5-volt reference circuit 2 and provides ground on a low reference circuit. The boost pressure sensor provides a signal to the PCM on a signal circuit relative to pressure changes. The PCM monitors the boost pressure sensor signal for a voltage outside the normal range. The PCM calculates a predicted value for the boost pressure sensor. The PCM then compares the predicted value to the actual signal.

P1247 GMC – Fuel Injector 8 Control Circuit Short

P1247 GMC Possible Causes

Faulty fuel injector 8
Fuel injector 8 harness is open or shorted
Poor electrical connection in fuel injector 8 circuit
Faulty Engine Control Module (ECM)

How is the P1247 GMC code repaired?

Possible Symptoms

Engine light on (or service engine soon warning light)

P1247 GMC Meaning

The Engine Control Module (ECM) provides voltage to each fuel injector on the positive voltage injector control circuits. The ECM powers each fuel injector by grounding that fuel injector’s control circuit. The ECM monitors the status of the positive voltage injector control circuits and the fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the related fuel injector group. The Diagnostic Trouble Code (DTC) will be set when the ECM injector output driver detects incorrect current on a fuel injector circuit.

P1247 HONDA – Malfunction in Accelerator Pedal Position Sensor 2 Circuit

P1247 HONDA Possible Causes

Faulty Accelerator Pedal Position Sensor 2
Accelerator Pedal Position Sensor 2 harness is open or shorted
Poor electrical connection in Accelerator Pedal Position Sensor 2 circuit

How is the HONDA P1247 code repair done?

Possible Symptoms

Engine Light On (or Service Engine Soon Warning Light)

P1247 HONDA Meaning

Accelerator Pedal Position Sensor 2 Circuit Malfunction is the generic description for the Honda P1247 code, but the manufacturer may have a different description for your vehicle’s model and year. Currently, we have no further information about the Honda P1247 OBDII code.