P1713

Code

ALFA ROMEO P — Powertrain

Neutral signal to engine ECU fault

Brand: ALFA ROMEO

Type: P — Powertrain

Views: UK: 2 EN: 4 RU: 4

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

Neutral signal to engine ECU fault — the engine control module has detected an invalid, missing, or intermittent neutral position input from the transmission/neutral switch circuit. Check switch, wiring, connectors, grounds, and ECU input.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

DAEWOO P — Powertrain

Fluid temp. snsr ct-high input

Brand: DAEWOO

Type: P — Powertrain

Views: UK: 1 EN: 6 RU: 2

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

FIAT P — Powertrain

Neutral signal to engine ECU fault

Brand: FIAT

Type: P — Powertrain

Views: UK: 2 EN: 6 RU: 4

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

FORD P — Powertrain

TFT Sensor In Range Failure Low Value

Brand: FORD

Type: P — Powertrain

Views: UK: 12 EN: 28 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

LAND ROVER P — Powertrain

Transmission fluid temperature sensor in range failure

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 1 EN: 8 RU: 2

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

LINCOLN P — Powertrain

TFT Sensor In Range Failure Low Value

Brand: LINCOLN

Type: P — Powertrain

Views: UK: 12 EN: 33 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

MAZDA P — Powertrain

Transmission Fluid Temperature Sensor Circuit

Brand: MAZDA

Type: P — Powertrain

Views: UK: 12 EN: 27 RU: 13

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

MERCURY P — Powertrain

TFT Sensor In Range Failure Low Value

Brand: MERCURY

Type: P — Powertrain

Views: UK: 12 EN: 32 RU: 16

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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

Code

P1713

Other P — Powertrain

TFT Sensor In Range Failure Low Value

Brand: Other

Type: P — Powertrain

Views: UK: 13 EN: 36 RU: 16

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty neutral (gear position) switch on the transmission
Damaged wiring harness (open, short to battery or ground) between neutral switch and engine ECU
Corroded or loose connector at the neutral switch or ECU
Poor or missing ground or reference voltage to the neutral switch circuit
Intermittent connection from vibration or damaged pins
Faulty engine ECU input circuit (internal)

Symptoms

Neutral lamp/indicator incorrect or not switching when gearbox in neutral
Starter inhibited or engine will only start in certain gear positions
DTC P1713 stored (may be accompanied by other transmission/PRNDL codes)
Intermittent starting issues or no-start in expected conditions
Possible limp or reduced functionality related to safety interlocks

What to check

Read all stored and pending codes; record freeze-frame and related codes (transmission, immobilizer, battery voltage)
Visual inspection of neutral switch wiring, connectors and transmission harness for damage, corrosion or pin push-out
Check relevant fuses and shared power/ground circuits
Backprobe neutral switch connector and ECU input with connector connected while operating gear selector
Wiggle test harness while monitoring signal for intermittent changes
Measure continuity and resistance between neutral switch and ECU connector with ignition off

Signal parameters

Expected idle/default state and active state depend on vehicle wiring — typically a switched logic level (0 V when closed to ground, or approximately +5 V/12 V when opened) — consult Alfa Romeo wiring for exact levels
With ignition ON and transmission in neutral: neutral input should change state compared with other gears; typical logic thresholds: low 4 V for 5 V logic circuits (verify with wiring diagram)
No-signal: open circuit or infinite resistance between switch and ECU
Intermittent: fluctuating voltage when backprobing while moving selector between gears
Reference supply (if used): stable supply voltage (often 5 V or ignition-switched 12 V) present at the switch connector pin

Diagnostic algorithm

Retrieve and record all DTCs and freeze-frame data using a capable scan tool. Note any related transmission or immobilizer codes.
Perform a visual inspection of the neutral switch, its mounting, linkage adjustment, and wiring harness for obvious damage or corrosion.
Identify the neutral switch and ECU pins from the vehicle wiring diagram; check connector security and pin condition.
With ignition ON (engine off), backprobe the neutral switch connector and observe the signal while selecting neutral and other gears. Verify the signal changes as expected.
Backprobe the corresponding ECU input pin (with harness connected) and confirm the ECU sees the same signal. Compare to expected voltage levels from wiring diagram.
If the signal is missing at the ECU but present at the switch, test continuity between switch and ECU connector and inspect for short to ground/battery.
If the signal is missing at the switch, check reference supply and ground at the switch. Repair open/shorts or bad grounds as found.
If intermittent signal occurs, perform a wiggle test on wiring/connector while monitoring voltage; repair/replace damaged sections or connectors.
If wiring and switch test good, consider replacing the neutral switch and re-test. After replacement, clear codes and verify operation.
If new switch and wiring are good but fault persists at the ECU input, suspect ECU input circuit fault — verify with manufacturer guidance and consider ECU repair/replacement or consult dealer-level diagnostics.
After repairs, clear codes, perform functional test (start/gear selection), and road-test to confirm the fault does not return.

Likely causes

Wiring/connector fault between neutral switch and engine ECU (most common)
Failed/dirty neutral switch or misadjusted mechanical linkage
Bad ground or reference feed for the neutral input
Intermittent contact at multi-way connector (corrosion, bent pins)
Less likely: internal ECU input failure

Fault status

⚠️ Status

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 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