P1899 Code - Park/Neutral Switch Circuit Conditions
Quick Answer
Engine cranking and Park/Neutral (P/N) indicated, or in drive with Vehicle Speed Sensor (VSS) over 50 mph, engine speed at 1985-4400 rpm, Throttle Position (TP) sensor indicating open throttle and the Powertrain Control Module (PCM) detects a Manifold Absolute Pressure (MAP) input that was over 66% of the BARO input with a high P/N input. Common causes include Faulty Park/Neutral Switch, Park/Neutral Switch harness is open or shorted, Park/Neutral Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1899 indicates Park/Neutral Switch Circuit Conditions.
- Common causes
- Common causes include Faulty Park/Neutral Switch, Park/Neutral Switch harness is open or shorted, Park/Neutral Switch circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1899 Description
What are the Possible Causes of the DTC P1899?
- Faulty Park/Neutral Switch
- Park/Neutral Switch harness is open or shorted
- Park/Neutral Switch circuit poor electrical connection
How to Fix the DTC P1899?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1899 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P1899 Acura — CVT Drive Pulley Pressure Control Valve Stuck OFF or ON
- P1899 Chevrolet — Axle Torque Secondary Signal Message Counter Incorrect
- P1899 Chrysler — Park/Neutral Switch Circuit Conditions
- P1899 Dodge — Park/Neutral Switch Circuit Conditions
- P1899 GMC — Axle Torque Secondary Signal Message Counter Incorrect
- P1899 Honda — CVT Drive Pulley Pressure Control Valve Stuck OFF or ON
- P1899 Jeep — Park/Neutral Switch Circuit Conditions
Frequently Asked Questions about P1899 Code
1. What does the OBDII code P1899 mean?
P1899 indicates an issue with the park/neutral switch circuit, which monitors if the transmission is in park or neutral before allowing the engine to start.
2. What are the common symptoms of a P1899 code?
Symptoms include the engine not starting, the vehicle starting in unintended gears, or the check engine light turning on.
3. What causes the P1899 code to appear?
Common causes include a faulty park/neutral switch, damaged wiring, corroded electrical connections, or a malfunctioning transmission control module (TCM).
4. Can I drive with a P1899 code?
Driving may be possible, but it is unsafe if the vehicle starts in gears other than park or neutral. Immediate repair is recommended.
5. How do I diagnose the P1899 code?
Diagnosis involves using a scan tool to confirm the code, inspecting the park/neutral switch, checking wiring and connectors, and testing the functionality of the switch.
6. How do I fix a P1899 code?
Repairs may include replacing the park/neutral switch, repairing damaged wiring, cleaning corroded connections, or reprogramming the TCM if needed.
7. How much does it cost to repair a P1899 code?
The repair cost varies but typically ranges from $150 to $300, depending on labor rates and whether the park/neutral switch needs replacement.
8. Can a bad park/neutral switch damage my transmission?
While it doesn’t directly damage the transmission, a faulty switch can cause unsafe starting conditions and potential wear on other components if ignored.
9. Will clearing the P1899 code fix the problem?
Clearing the code without addressing the underlying issue will only temporarily remove the code; the problem will persist.
10. Can a weak battery cause a P1899 code?
A weak battery is unlikely to cause this code, but voltage-related issues could exacerbate electrical problems in the circuit.
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