Code
P2127
Generic
P — Powertrain
Throttle/Pedal Position Sensor/Switch E Circuit Low
Views:
UK: 14
EN: 24
RU: 19
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or loose connector at the throttle or accelerator pedal position sensor
- Wiring shorted to ground between the sensor and PCM
- Broken or pinched wiring causing high resistance or open circuit
- Low or missing reference voltage from the PCM (typically a 5 V reference)
- Poor or missing sensor ground
- Internal failure of the throttle or pedal position sensor/switch
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or limp-home mode may be activated
- Unstable or incorrect throttle response (hesitation, unexpected acceleration limitations)
- Cruise control may be disabled
- Stored trouble code(s) related to throttle/pedal position
What to check
- Read freeze frame and stored data with a scan tool to capture operating conditions when the code set
- Visually inspect connectors and wiring for damage, corrosion, and secure fit at sensor and PCM
- Backprobe the sensor connector to measure signal, reference, and ground voltages with key on engine off (KOEO) and with accelerator pedal moved
- Check for continuity to chassis ground and for short to ground between the signal wire and ground
- Wiggle test the wiring harness while monitoring live data to look for intermittent changes
- Compare live sensor voltage to expected values while moving the pedal or throttle
Signal parameters
- Reference (Vref) typically ~5.0 V from PCM (measure with key on)
- Sensor signal voltage nominally varies ~0.5–4.5 V across travel (manufacturer-specific)
- Low threshold: signal < ~0.2–0.3 V is considered low/fault (may vary by OEM)
- High threshold: signal > ~4.8–5.0 V indicates high/fault (for reference only)
- Expected circuit continuity from sensor signal pin to PCM signal pin: near 0 ohms (check for open/high resistance)
- Sensor ground continuity to chassis/PCM ground: near 0 ohms
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data with a scan tool; note battery voltage and engine state.
- Visually inspect the throttle/pedal sensor connector and wiring for damage, corrosion, pin push-out, or bent pins.
- With key ON (engine off), backprobe: verify Vref (≈5 V) at sensor connector, sensor ground, and sensor signal voltage. Record values at rest and while moving pedal/throttle.
- If Vref is missing, check PCM fuse(s) and wiring for supply to PCM; verify PCM output on reference circuit.
- If Vref present but signal is low, inspect for short to ground: disconnect sensor and measure resistance between signal wire and ground; a short will show near 0 ohms.
- Perform continuity check between sensor signal pin and PCM signal pin; repair any opens or high-resistance wiring.
- Perform wiggle test of harness between sensor and PCM while monitoring live signal voltage for intermittent faults.
- If wiring and connectors check good, compare sensor resistance (if applicable) to manufacturer specification or substitute known-good sensor to confirm.
- After repairs or component replacement, clear codes, perform key-on and run tests, then road test to verify the code does not return.
- If code persists despite good wiring and correct voltages, consider PCM input fault — consult OEM procedures before replacement.
Likely causes
- Corroded/loose connector at the sensor
- Short to ground in the sensor signal wire
- Failed throttle/pedal position sensor
Fault status
Status
PCM detected low voltage on the Throttle/Pedal Position Sensor/Switch E circuit (signal below minimum threshold).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Workshop ManualYour experience will help others
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Code
P2127
HUMMER
P — Powertrain
Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
Views:
UK: 2
EN: 13
RU: 7
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or loose connector at the throttle or accelerator pedal position sensor
- Wiring shorted to ground between the sensor and PCM
- Broken or pinched wiring causing high resistance or open circuit
- Low or missing reference voltage from the PCM (typically a 5 V reference)
- Poor or missing sensor ground
- Internal failure of the throttle or pedal position sensor/switch
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or limp-home mode may be activated
- Unstable or incorrect throttle response (hesitation, unexpected acceleration limitations)
- Cruise control may be disabled
- Stored trouble code(s) related to throttle/pedal position
What to check
- Read freeze frame and stored data with a scan tool to capture operating conditions when the code set
- Visually inspect connectors and wiring for damage, corrosion, and secure fit at sensor and PCM
- Backprobe the sensor connector to measure signal, reference, and ground voltages with key on engine off (KOEO) and with accelerator pedal moved
- Check for continuity to chassis ground and for short to ground between the signal wire and ground
- Wiggle test the wiring harness while monitoring live data to look for intermittent changes
- Compare live sensor voltage to expected values while moving the pedal or throttle
Signal parameters
- Reference (Vref) typically ~5.0 V from PCM (measure with key on)
- Sensor signal voltage nominally varies ~0.5–4.5 V across travel (manufacturer-specific)
- Low threshold: signal < ~0.2–0.3 V is considered low/fault (may vary by OEM)
- High threshold: signal > ~4.8–5.0 V indicates high/fault (for reference only)
- Expected circuit continuity from sensor signal pin to PCM signal pin: near 0 ohms (check for open/high resistance)
- Sensor ground continuity to chassis/PCM ground: near 0 ohms
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data with a scan tool; note battery voltage and engine state.
- Visually inspect the throttle/pedal sensor connector and wiring for damage, corrosion, pin push-out, or bent pins.
- With key ON (engine off), backprobe: verify Vref (≈5 V) at sensor connector, sensor ground, and sensor signal voltage. Record values at rest and while moving pedal/throttle.
- If Vref is missing, check PCM fuse(s) and wiring for supply to PCM; verify PCM output on reference circuit.
- If Vref present but signal is low, inspect for short to ground: disconnect sensor and measure resistance between signal wire and ground; a short will show near 0 ohms.
- Perform continuity check between sensor signal pin and PCM signal pin; repair any opens or high-resistance wiring.
- Perform wiggle test of harness between sensor and PCM while monitoring live signal voltage for intermittent faults.
- If wiring and connectors check good, compare sensor resistance (if applicable) to manufacturer specification or substitute known-good sensor to confirm.
- After repairs or component replacement, clear codes, perform key-on and run tests, then road test to verify the code does not return.
- If code persists despite good wiring and correct voltages, consider PCM input fault — consult OEM procedures before replacement.
Likely causes
- Corroded/loose connector at the sensor
- Short to ground in the sensor signal wire
- Failed throttle/pedal position sensor
Fault status
Status
PCM detected low voltage on the Throttle/Pedal Position Sensor/Switch E circuit (signal below minimum threshold).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
P2127
ISUZU
P — Powertrain
Pedal Position Sensor 2 Circuit Low Input
Views:
UK: 11
EN: 18
RU: 12
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or loose connector at the throttle or accelerator pedal position sensor
- Wiring shorted to ground between the sensor and PCM
- Broken or pinched wiring causing high resistance or open circuit
- Low or missing reference voltage from the PCM (typically a 5 V reference)
- Poor or missing sensor ground
- Internal failure of the throttle or pedal position sensor/switch
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or limp-home mode may be activated
- Unstable or incorrect throttle response (hesitation, unexpected acceleration limitations)
- Cruise control may be disabled
- Stored trouble code(s) related to throttle/pedal position
What to check
- Read freeze frame and stored data with a scan tool to capture operating conditions when the code set
- Visually inspect connectors and wiring for damage, corrosion, and secure fit at sensor and PCM
- Backprobe the sensor connector to measure signal, reference, and ground voltages with key on engine off (KOEO) and with accelerator pedal moved
- Check for continuity to chassis ground and for short to ground between the signal wire and ground
- Wiggle test the wiring harness while monitoring live data to look for intermittent changes
- Compare live sensor voltage to expected values while moving the pedal or throttle
Signal parameters
- Reference (Vref) typically ~5.0 V from PCM (measure with key on)
- Sensor signal voltage nominally varies ~0.5–4.5 V across travel (manufacturer-specific)
- Low threshold: signal < ~0.2–0.3 V is considered low/fault (may vary by OEM)
- High threshold: signal > ~4.8–5.0 V indicates high/fault (for reference only)
- Expected circuit continuity from sensor signal pin to PCM signal pin: near 0 ohms (check for open/high resistance)
- Sensor ground continuity to chassis/PCM ground: near 0 ohms
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data with a scan tool; note battery voltage and engine state.
- Visually inspect the throttle/pedal sensor connector and wiring for damage, corrosion, pin push-out, or bent pins.
- With key ON (engine off), backprobe: verify Vref (≈5 V) at sensor connector, sensor ground, and sensor signal voltage. Record values at rest and while moving pedal/throttle.
- If Vref is missing, check PCM fuse(s) and wiring for supply to PCM; verify PCM output on reference circuit.
- If Vref present but signal is low, inspect for short to ground: disconnect sensor and measure resistance between signal wire and ground; a short will show near 0 ohms.
- Perform continuity check between sensor signal pin and PCM signal pin; repair any opens or high-resistance wiring.
- Perform wiggle test of harness between sensor and PCM while monitoring live signal voltage for intermittent faults.
- If wiring and connectors check good, compare sensor resistance (if applicable) to manufacturer specification or substitute known-good sensor to confirm.
- After repairs or component replacement, clear codes, perform key-on and run tests, then road test to verify the code does not return.
- If code persists despite good wiring and correct voltages, consider PCM input fault — consult OEM procedures before replacement.
Likely causes
- Corroded/loose connector at the sensor
- Short to ground in the sensor signal wire
- Failed throttle/pedal position sensor
Fault status
Status
PCM detected low voltage on the Throttle/Pedal Position Sensor/Switch E circuit (signal below minimum threshold).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
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Code
P2127
LAND ROVER
P — Powertrain
Throttle position sensor/pedal/switch E circuit low input
Views:
UK: 2
EN: 8
RU: 3
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or loose connector at the throttle or accelerator pedal position sensor
- Wiring shorted to ground between the sensor and PCM
- Broken or pinched wiring causing high resistance or open circuit
- Low or missing reference voltage from the PCM (typically a 5 V reference)
- Poor or missing sensor ground
- Internal failure of the throttle or pedal position sensor/switch
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or limp-home mode may be activated
- Unstable or incorrect throttle response (hesitation, unexpected acceleration limitations)
- Cruise control may be disabled
- Stored trouble code(s) related to throttle/pedal position
What to check
- Read freeze frame and stored data with a scan tool to capture operating conditions when the code set
- Visually inspect connectors and wiring for damage, corrosion, and secure fit at sensor and PCM
- Backprobe the sensor connector to measure signal, reference, and ground voltages with key on engine off (KOEO) and with accelerator pedal moved
- Check for continuity to chassis ground and for short to ground between the signal wire and ground
- Wiggle test the wiring harness while monitoring live data to look for intermittent changes
- Compare live sensor voltage to expected values while moving the pedal or throttle
Signal parameters
- Reference (Vref) typically ~5.0 V from PCM (measure with key on)
- Sensor signal voltage nominally varies ~0.5–4.5 V across travel (manufacturer-specific)
- Low threshold: signal < ~0.2–0.3 V is considered low/fault (may vary by OEM)
- High threshold: signal > ~4.8–5.0 V indicates high/fault (for reference only)
- Expected circuit continuity from sensor signal pin to PCM signal pin: near 0 ohms (check for open/high resistance)
- Sensor ground continuity to chassis/PCM ground: near 0 ohms
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data with a scan tool; note battery voltage and engine state.
- Visually inspect the throttle/pedal sensor connector and wiring for damage, corrosion, pin push-out, or bent pins.
- With key ON (engine off), backprobe: verify Vref (≈5 V) at sensor connector, sensor ground, and sensor signal voltage. Record values at rest and while moving pedal/throttle.
- If Vref is missing, check PCM fuse(s) and wiring for supply to PCM; verify PCM output on reference circuit.
- If Vref present but signal is low, inspect for short to ground: disconnect sensor and measure resistance between signal wire and ground; a short will show near 0 ohms.
- Perform continuity check between sensor signal pin and PCM signal pin; repair any opens or high-resistance wiring.
- Perform wiggle test of harness between sensor and PCM while monitoring live signal voltage for intermittent faults.
- If wiring and connectors check good, compare sensor resistance (if applicable) to manufacturer specification or substitute known-good sensor to confirm.
- After repairs or component replacement, clear codes, perform key-on and run tests, then road test to verify the code does not return.
- If code persists despite good wiring and correct voltages, consider PCM input fault — consult OEM procedures before replacement.
Likely causes
- Corroded/loose connector at the sensor
- Short to ground in the sensor signal wire
- Failed throttle/pedal position sensor
Fault status
Status
PCM detected low voltage on the Throttle/Pedal Position Sensor/Switch E circuit (signal below minimum threshold).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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Send to email
Code
P2127
MITSUBISHI
P — Powertrain
APS(sub) low
Views:
UK: 3
EN: 11
RU: 9
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or loose connector at the throttle or accelerator pedal position sensor
- Wiring shorted to ground between the sensor and PCM
- Broken or pinched wiring causing high resistance or open circuit
- Low or missing reference voltage from the PCM (typically a 5 V reference)
- Poor or missing sensor ground
- Internal failure of the throttle or pedal position sensor/switch
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or limp-home mode may be activated
- Unstable or incorrect throttle response (hesitation, unexpected acceleration limitations)
- Cruise control may be disabled
- Stored trouble code(s) related to throttle/pedal position
What to check
- Read freeze frame and stored data with a scan tool to capture operating conditions when the code set
- Visually inspect connectors and wiring for damage, corrosion, and secure fit at sensor and PCM
- Backprobe the sensor connector to measure signal, reference, and ground voltages with key on engine off (KOEO) and with accelerator pedal moved
- Check for continuity to chassis ground and for short to ground between the signal wire and ground
- Wiggle test the wiring harness while monitoring live data to look for intermittent changes
- Compare live sensor voltage to expected values while moving the pedal or throttle
Signal parameters
- Reference (Vref) typically ~5.0 V from PCM (measure with key on)
- Sensor signal voltage nominally varies ~0.5–4.5 V across travel (manufacturer-specific)
- Low threshold: signal < ~0.2–0.3 V is considered low/fault (may vary by OEM)
- High threshold: signal > ~4.8–5.0 V indicates high/fault (for reference only)
- Expected circuit continuity from sensor signal pin to PCM signal pin: near 0 ohms (check for open/high resistance)
- Sensor ground continuity to chassis/PCM ground: near 0 ohms
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data with a scan tool; note battery voltage and engine state.
- Visually inspect the throttle/pedal sensor connector and wiring for damage, corrosion, pin push-out, or bent pins.
- With key ON (engine off), backprobe: verify Vref (≈5 V) at sensor connector, sensor ground, and sensor signal voltage. Record values at rest and while moving pedal/throttle.
- If Vref is missing, check PCM fuse(s) and wiring for supply to PCM; verify PCM output on reference circuit.
- If Vref present but signal is low, inspect for short to ground: disconnect sensor and measure resistance between signal wire and ground; a short will show near 0 ohms.
- Perform continuity check between sensor signal pin and PCM signal pin; repair any opens or high-resistance wiring.
- Perform wiggle test of harness between sensor and PCM while monitoring live signal voltage for intermittent faults.
- If wiring and connectors check good, compare sensor resistance (if applicable) to manufacturer specification or substitute known-good sensor to confirm.
- After repairs or component replacement, clear codes, perform key-on and run tests, then road test to verify the code does not return.
- If code persists despite good wiring and correct voltages, consider PCM input fault — consult OEM procedures before replacement.
Likely causes
- Corroded/loose connector at the sensor
- Short to ground in the sensor signal wire
- Failed throttle/pedal position sensor
Fault status
Status
PCM detected low voltage on the Throttle/Pedal Position Sensor/Switch E circuit (signal below minimum threshold).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email