Code
P0708
Generic
P — Powertrain
Transmission Range Sensor A Circuit High
Views:
UK: 17
EN: 36
RU: 31
AI status
Completed
Completed
100%
Causes
- Damaged or shorted wiring (signal shorted to battery voltage)
- Corroded, loose or bent connector pins at sensor or PCM
- Failed transmission range sensor / neutral safety switch
- Poor or missing ground or power reference to the sensor
- Incorrectly adjusted shift linkage or mechanically stuck range switch
- Intermittent connection from water/contamination
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Incorrect or no gear indication on dash
- Engine may not crank (no-start) or starter inhibited because PCM does not detect Park/Neutral
- Transmission may go into limp/home gear or fail to shift correctly
- Intermittent starting or shift problems correlated with vibration or movement
What to check
- Scan for stored/freeze-frame data and pending codes; note gear reported by PCM and freeze frame conditions
- Visually inspect TR sensor connector and wiring for corrosion, damage, pin push-out, or water intrusion
- Backprobe the TR sensor signal, reference (usually 5V) and ground with key ON (engine OFF); compare to specification
- Wiggle harness and shift linkage while monitoring signal to reproduce fault or intermittent behavior
- Check continuity between sensor connector and PCM for shorts to power or loss of continuity to PCM pins
- Confirm proper shift linkage alignment/operation and that sensor moves to correct positions as lever is moved
Signal parameters
- Typical PCM reference voltage: ~5.0 V (varies by make/model)
- Expected TR sensor signal range: 0–5 V depending on gear and sensor design
- Circuit High condition: signal voltage significantly above expected threshold (often >4.5 V or near battery voltage)
- Resistance checks (if sensor is a potentiometer type): compare to service specification; open/high resistance indicates fault
- No short to battery: signal wire should not read full battery voltage (~12 V) when it should be low
Diagnostic algorithm
- Read and record codes and freeze-frame data. Clear codes, then attempt to re-create the fault to verify it's current.
- Confirm actual gear selector position vs. PCM-reported position using a scan tool. Note any mismatch.
- Visually inspect the TR sensor connector and wiring harness at the transmission for obvious damage or corrosion.
- With key ON (engine OFF), backprobe the sensor connector: verify reference voltage, signal voltage, and ground. Move shifter through all positions and watch signal changes.
- If signal reads high, disconnect the TR sensor and measure signal wire voltage at the connector to check for short to battery. If voltage remains high with sensor disconnected, suspect wiring short to 12 V or PCM.
- Check continuity and resistance of the signal wire between sensor connector and PCM pin; inspect for short to battery or to adjacent power circuits.
- Wiggle test harness and operate shift linkage while monitoring signal to find intermittent faults. Repair any damaged wiring or connectors found.
- If wiring and connectors check good and signal behavior is still abnormal, replace the transmission range sensor/switch assembly and retest.
- If problem persists after sensor replacement, suspect PCM fault; verify PCM grounds and power supplies, then consult manufacturer procedures or test/replace PCM as last resort.
- After repair, clear codes and verify fault does not return under multiple drive/shift cycles.
Likely causes
- Chafed harness contacting a fused 12 V source causing a short-to-battery on the signal wire
- Corroded connector at the transmission range sensor pulling signal toward battery voltage
- Failed TR sensor internally forcing an open/ high impedance that reads high to the PCM
- Aftermarket repairs or previous service left damaged pins or incorrect connector
- Moisture intrusion causing intermittent high-voltage readings
Fault status
Status
PCM detected Transmission Range Sensor A circuit voltage higher than expected and set code P0708. The vehicle may not recognize the selected gear, may not start, or may shift poorly. Inspect TR sensor wiring, connector, sensor, and PCM inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
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AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
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Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
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Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
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Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
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Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
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Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
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Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
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Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
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LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
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Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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Code
P0708
GWM
P — Powertrain
- High Transmission Sensor
Views:
UK: 2
EN: 6
RU: 8
AI status
Completed
Completed
100%
Causes
- Damaged or shorted wiring (signal shorted to battery voltage)
- Corroded, loose or bent connector pins at sensor or PCM
- Failed transmission range sensor / neutral safety switch
- Poor or missing ground or power reference to the sensor
- Incorrectly adjusted shift linkage or mechanically stuck range switch
- Intermittent connection from water/contamination
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Incorrect or no gear indication on dash
- Engine may not crank (no-start) or starter inhibited because PCM does not detect Park/Neutral
- Transmission may go into limp/home gear or fail to shift correctly
- Intermittent starting or shift problems correlated with vibration or movement
What to check
- Scan for stored/freeze-frame data and pending codes; note gear reported by PCM and freeze frame conditions
- Visually inspect TR sensor connector and wiring for corrosion, damage, pin push-out, or water intrusion
- Backprobe the TR sensor signal, reference (usually 5V) and ground with key ON (engine OFF); compare to specification
- Wiggle harness and shift linkage while monitoring signal to reproduce fault or intermittent behavior
- Check continuity between sensor connector and PCM for shorts to power or loss of continuity to PCM pins
- Confirm proper shift linkage alignment/operation and that sensor moves to correct positions as lever is moved
Signal parameters
- Typical PCM reference voltage: ~5.0 V (varies by make/model)
- Expected TR sensor signal range: 0–5 V depending on gear and sensor design
- Circuit High condition: signal voltage significantly above expected threshold (often >4.5 V or near battery voltage)
- Resistance checks (if sensor is a potentiometer type): compare to service specification; open/high resistance indicates fault
- No short to battery: signal wire should not read full battery voltage (~12 V) when it should be low
Diagnostic algorithm
- Read and record codes and freeze-frame data. Clear codes, then attempt to re-create the fault to verify it's current.
- Confirm actual gear selector position vs. PCM-reported position using a scan tool. Note any mismatch.
- Visually inspect the TR sensor connector and wiring harness at the transmission for obvious damage or corrosion.
- With key ON (engine OFF), backprobe the sensor connector: verify reference voltage, signal voltage, and ground. Move shifter through all positions and watch signal changes.
- If signal reads high, disconnect the TR sensor and measure signal wire voltage at the connector to check for short to battery. If voltage remains high with sensor disconnected, suspect wiring short to 12 V or PCM.
- Check continuity and resistance of the signal wire between sensor connector and PCM pin; inspect for short to battery or to adjacent power circuits.
- Wiggle test harness and operate shift linkage while monitoring signal to find intermittent faults. Repair any damaged wiring or connectors found.
- If wiring and connectors check good and signal behavior is still abnormal, replace the transmission range sensor/switch assembly and retest.
- If problem persists after sensor replacement, suspect PCM fault; verify PCM grounds and power supplies, then consult manufacturer procedures or test/replace PCM as last resort.
- After repair, clear codes and verify fault does not return under multiple drive/shift cycles.
Likely causes
- Chafed harness contacting a fused 12 V source causing a short-to-battery on the signal wire
- Corroded connector at the transmission range sensor pulling signal toward battery voltage
- Failed TR sensor internally forcing an open/ high impedance that reads high to the PCM
- Aftermarket repairs or previous service left damaged pins or incorrect connector
- Moisture intrusion causing intermittent high-voltage readings
Fault status
Status
PCM detected Transmission Range Sensor A circuit voltage higher than expected and set code P0708. The vehicle may not recognize the selected gear, may not start, or may shift poorly. Inspect TR sensor wiring, connector, sensor, and PCM inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P0708
HUMMER
P — Powertrain
Transmission Range Sensor Circuit High Input
Views:
UK: 6
EN: 15
RU: 18
AI status
Completed
Completed
100%
Causes
- Damaged or shorted wiring (signal shorted to battery voltage)
- Corroded, loose or bent connector pins at sensor or PCM
- Failed transmission range sensor / neutral safety switch
- Poor or missing ground or power reference to the sensor
- Incorrectly adjusted shift linkage or mechanically stuck range switch
- Intermittent connection from water/contamination
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Incorrect or no gear indication on dash
- Engine may not crank (no-start) or starter inhibited because PCM does not detect Park/Neutral
- Transmission may go into limp/home gear or fail to shift correctly
- Intermittent starting or shift problems correlated with vibration or movement
What to check
- Scan for stored/freeze-frame data and pending codes; note gear reported by PCM and freeze frame conditions
- Visually inspect TR sensor connector and wiring for corrosion, damage, pin push-out, or water intrusion
- Backprobe the TR sensor signal, reference (usually 5V) and ground with key ON (engine OFF); compare to specification
- Wiggle harness and shift linkage while monitoring signal to reproduce fault or intermittent behavior
- Check continuity between sensor connector and PCM for shorts to power or loss of continuity to PCM pins
- Confirm proper shift linkage alignment/operation and that sensor moves to correct positions as lever is moved
Signal parameters
- Typical PCM reference voltage: ~5.0 V (varies by make/model)
- Expected TR sensor signal range: 0–5 V depending on gear and sensor design
- Circuit High condition: signal voltage significantly above expected threshold (often >4.5 V or near battery voltage)
- Resistance checks (if sensor is a potentiometer type): compare to service specification; open/high resistance indicates fault
- No short to battery: signal wire should not read full battery voltage (~12 V) when it should be low
Diagnostic algorithm
- Read and record codes and freeze-frame data. Clear codes, then attempt to re-create the fault to verify it's current.
- Confirm actual gear selector position vs. PCM-reported position using a scan tool. Note any mismatch.
- Visually inspect the TR sensor connector and wiring harness at the transmission for obvious damage or corrosion.
- With key ON (engine OFF), backprobe the sensor connector: verify reference voltage, signal voltage, and ground. Move shifter through all positions and watch signal changes.
- If signal reads high, disconnect the TR sensor and measure signal wire voltage at the connector to check for short to battery. If voltage remains high with sensor disconnected, suspect wiring short to 12 V or PCM.
- Check continuity and resistance of the signal wire between sensor connector and PCM pin; inspect for short to battery or to adjacent power circuits.
- Wiggle test harness and operate shift linkage while monitoring signal to find intermittent faults. Repair any damaged wiring or connectors found.
- If wiring and connectors check good and signal behavior is still abnormal, replace the transmission range sensor/switch assembly and retest.
- If problem persists after sensor replacement, suspect PCM fault; verify PCM grounds and power supplies, then consult manufacturer procedures or test/replace PCM as last resort.
- After repair, clear codes and verify fault does not return under multiple drive/shift cycles.
Likely causes
- Chafed harness contacting a fused 12 V source causing a short-to-battery on the signal wire
- Corroded connector at the transmission range sensor pulling signal toward battery voltage
- Failed TR sensor internally forcing an open/ high impedance that reads high to the PCM
- Aftermarket repairs or previous service left damaged pins or incorrect connector
- Moisture intrusion causing intermittent high-voltage readings
Fault status
Status
PCM detected Transmission Range Sensor A circuit voltage higher than expected and set code P0708. The vehicle may not recognize the selected gear, may not start, or may shift poorly. Inspect TR sensor wiring, connector, sensor, and PCM inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P0708
LAND ROVER
P — Powertrain
Transmission range circuit sensor position
Views:
UK: 5
EN: 11
RU: 10
AI status
Completed
Completed
100%
Causes
- Damaged or shorted wiring (signal shorted to battery voltage)
- Corroded, loose or bent connector pins at sensor or PCM
- Failed transmission range sensor / neutral safety switch
- Poor or missing ground or power reference to the sensor
- Incorrectly adjusted shift linkage or mechanically stuck range switch
- Intermittent connection from water/contamination
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Incorrect or no gear indication on dash
- Engine may not crank (no-start) or starter inhibited because PCM does not detect Park/Neutral
- Transmission may go into limp/home gear or fail to shift correctly
- Intermittent starting or shift problems correlated with vibration or movement
What to check
- Scan for stored/freeze-frame data and pending codes; note gear reported by PCM and freeze frame conditions
- Visually inspect TR sensor connector and wiring for corrosion, damage, pin push-out, or water intrusion
- Backprobe the TR sensor signal, reference (usually 5V) and ground with key ON (engine OFF); compare to specification
- Wiggle harness and shift linkage while monitoring signal to reproduce fault or intermittent behavior
- Check continuity between sensor connector and PCM for shorts to power or loss of continuity to PCM pins
- Confirm proper shift linkage alignment/operation and that sensor moves to correct positions as lever is moved
Signal parameters
- Typical PCM reference voltage: ~5.0 V (varies by make/model)
- Expected TR sensor signal range: 0–5 V depending on gear and sensor design
- Circuit High condition: signal voltage significantly above expected threshold (often >4.5 V or near battery voltage)
- Resistance checks (if sensor is a potentiometer type): compare to service specification; open/high resistance indicates fault
- No short to battery: signal wire should not read full battery voltage (~12 V) when it should be low
Diagnostic algorithm
- Read and record codes and freeze-frame data. Clear codes, then attempt to re-create the fault to verify it's current.
- Confirm actual gear selector position vs. PCM-reported position using a scan tool. Note any mismatch.
- Visually inspect the TR sensor connector and wiring harness at the transmission for obvious damage or corrosion.
- With key ON (engine OFF), backprobe the sensor connector: verify reference voltage, signal voltage, and ground. Move shifter through all positions and watch signal changes.
- If signal reads high, disconnect the TR sensor and measure signal wire voltage at the connector to check for short to battery. If voltage remains high with sensor disconnected, suspect wiring short to 12 V or PCM.
- Check continuity and resistance of the signal wire between sensor connector and PCM pin; inspect for short to battery or to adjacent power circuits.
- Wiggle test harness and operate shift linkage while monitoring signal to find intermittent faults. Repair any damaged wiring or connectors found.
- If wiring and connectors check good and signal behavior is still abnormal, replace the transmission range sensor/switch assembly and retest.
- If problem persists after sensor replacement, suspect PCM fault; verify PCM grounds and power supplies, then consult manufacturer procedures or test/replace PCM as last resort.
- After repair, clear codes and verify fault does not return under multiple drive/shift cycles.
Likely causes
- Chafed harness contacting a fused 12 V source causing a short-to-battery on the signal wire
- Corroded connector at the transmission range sensor pulling signal toward battery voltage
- Failed TR sensor internally forcing an open/ high impedance that reads high to the PCM
- Aftermarket repairs or previous service left damaged pins or incorrect connector
- Moisture intrusion causing intermittent high-voltage readings
Fault status
Status
PCM detected Transmission Range Sensor A circuit voltage higher than expected and set code P0708. The vehicle may not recognize the selected gear, may not start, or may shift poorly. Inspect TR sensor wiring, connector, sensor, and PCM inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your 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
P0708
MERCEDES-BENZ
P — Powertrain
Transmission Range Sensor Circuit High Input
Views:
UK: 10
EN: 21
RU: 23
AI status
Completed
Completed
100%
Causes
- Damaged or shorted wiring (signal shorted to battery voltage)
- Corroded, loose or bent connector pins at sensor or PCM
- Failed transmission range sensor / neutral safety switch
- Poor or missing ground or power reference to the sensor
- Incorrectly adjusted shift linkage or mechanically stuck range switch
- Intermittent connection from water/contamination
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Incorrect or no gear indication on dash
- Engine may not crank (no-start) or starter inhibited because PCM does not detect Park/Neutral
- Transmission may go into limp/home gear or fail to shift correctly
- Intermittent starting or shift problems correlated with vibration or movement
What to check
- Scan for stored/freeze-frame data and pending codes; note gear reported by PCM and freeze frame conditions
- Visually inspect TR sensor connector and wiring for corrosion, damage, pin push-out, or water intrusion
- Backprobe the TR sensor signal, reference (usually 5V) and ground with key ON (engine OFF); compare to specification
- Wiggle harness and shift linkage while monitoring signal to reproduce fault or intermittent behavior
- Check continuity between sensor connector and PCM for shorts to power or loss of continuity to PCM pins
- Confirm proper shift linkage alignment/operation and that sensor moves to correct positions as lever is moved
Signal parameters
- Typical PCM reference voltage: ~5.0 V (varies by make/model)
- Expected TR sensor signal range: 0–5 V depending on gear and sensor design
- Circuit High condition: signal voltage significantly above expected threshold (often >4.5 V or near battery voltage)
- Resistance checks (if sensor is a potentiometer type): compare to service specification; open/high resistance indicates fault
- No short to battery: signal wire should not read full battery voltage (~12 V) when it should be low
Diagnostic algorithm
- Read and record codes and freeze-frame data. Clear codes, then attempt to re-create the fault to verify it's current.
- Confirm actual gear selector position vs. PCM-reported position using a scan tool. Note any mismatch.
- Visually inspect the TR sensor connector and wiring harness at the transmission for obvious damage or corrosion.
- With key ON (engine OFF), backprobe the sensor connector: verify reference voltage, signal voltage, and ground. Move shifter through all positions and watch signal changes.
- If signal reads high, disconnect the TR sensor and measure signal wire voltage at the connector to check for short to battery. If voltage remains high with sensor disconnected, suspect wiring short to 12 V or PCM.
- Check continuity and resistance of the signal wire between sensor connector and PCM pin; inspect for short to battery or to adjacent power circuits.
- Wiggle test harness and operate shift linkage while monitoring signal to find intermittent faults. Repair any damaged wiring or connectors found.
- If wiring and connectors check good and signal behavior is still abnormal, replace the transmission range sensor/switch assembly and retest.
- If problem persists after sensor replacement, suspect PCM fault; verify PCM grounds and power supplies, then consult manufacturer procedures or test/replace PCM as last resort.
- After repair, clear codes and verify fault does not return under multiple drive/shift cycles.
Likely causes
- Chafed harness contacting a fused 12 V source causing a short-to-battery on the signal wire
- Corroded connector at the transmission range sensor pulling signal toward battery voltage
- Failed TR sensor internally forcing an open/ high impedance that reads high to the PCM
- Aftermarket repairs or previous service left damaged pins or incorrect connector
- Moisture intrusion causing intermittent high-voltage readings
Fault status
Status
PCM detected Transmission Range Sensor A circuit voltage higher than expected and set code P0708. The vehicle may not recognize the selected gear, may not start, or may shift poorly. Inspect TR sensor wiring, connector, sensor, and PCM inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Was this AI description helpful?
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👍 Like
0
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0
Send to email